Ps: Doc Harley recommends the same and in a response afterwards noted there is no selection in the Harley tuner for just an air cleaner upgrade!! Good job !!
Thank you. Yes, there are still a bunch of people (individuals and dealerships) that are perpetuating the falsehood that the M8 has the same lean problem as the Twin Cam. It does not. We have even removed some comments from this video of people that still posted that the M8 needs to have a tuner if a free flowing A/C and/or exhaust are added. We don't generally remove comments, but letting them stay can just further confuse what should be clear...a tuner is NOT needed to correct a too lean issue, since they are not too lean.
@@DKCustomProducts hey! What’s the deal with the 2021 m8? What’s the best option? Slip ons and a PV tune? Is the stock cleaner all good for a stage one? What’s the best way forward. Don’t want something too loud. Rinehart DBX45?
@@Elmuchacho17 Here is the video on the 2021 M8 models- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html Don't know which 2021 M8 you have, but one of the Outlaw Air Cleaners (they all come with an EBS) will significantly improve performance over the stock air cleaner. Here's a video showing just one of them- th-cam.com/video/KtbdOoVNL9g/w-d-xo.html You can run an Outlaw Air Cleaner and open exhaust with the stock tune. With a PV tune it will improve performance...but not as much as the air cleaner will improve it, and no damage will occur if you run the OEM tune. Regarding exhaust, that is a tricky question. Everyone's ears are different. This is the best advice we can give for someone not wanting to loud of exhaust- th-cam.com/video/H681dl2X_f4/w-d-xo.html
@Scooby doo Just put the DBX45 On my 21 roadglide. Totally change the way my bike runs And it sounds excellent. Check out direct cycle parts. Every place wanted $755 shipped with tax. Direct cycle Parts $579. No tax no shipping. I saved the $179. Just ordered the screaming eagle heavy air breather. I'm gonna slap it on without a tune and see what happens
Thanks for the advice guys. I have an aftermarket air cleaner and Freedom pipes. When l initially did it the bike was cold and it was revving unusually high. Gave it a about 10min and the bike automatically adjusted itself to the higher air intake and the free flowing exhaust system. My friends thought I was crazy. Thanks for making that clear about the M8 114. Now my friends are disappointed because they spent a small fortune getting tunes etc. Anyhow, love the channel and the straight forward information you guys give. It's refreshing to see. Cheers from Melbourne Australia!
Your more than welcome. You guys are great. You put myths to bed and save people money. Thanks again guys. You are doing great work. I enjoy your videos very much. Regards Harry from Melbourne Australia!
I so needed to see this video. Would love to see progression videos to see AFR results when changing slip-ons and then a full catless header. Keep up the great work guys.
You might like the video linked below. One of the bikes in it had our free flowing intake and slip-ons...if I remember correctly it still had the OEM header with the cat in it. But we have done many runs with and then without the cat, it does not make a difference in the AFR...video on cat at the bottom below. th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html th-cam.com/video/ks39Gwb3NdI/w-d-xo.html
This video applies to all M8's from 2017-2020. In 2021 HD changed the ECM. The video on 2021's is here- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html *THE PV-3B FOR 2021 M8'S IS NOW AVAILABLE. ALL DETAILS CAN BE SEEN AT THIS LINK- www.dkcustomproducts.com/dynojet-power-vision-flash-tuner-w-auto-tune-dk-pv-cmp-pkg.htm
I am dealing with this dilemma now. I just bought a 21 lowrider s and had no clue the bikes changed ECM. Now I'm having a hard time deciding on installing a full exhaust or having to wait until I can get a tuner. Additionally i can't even find any info on ayone who makes a tuner for this model year bike. All I know is I hate the sound of the exhaust from factory and was really looking forward to installing a S&S grand national 2-2.
@@sickinmyduck4017 Yeah, Harley has tried to lock out all aftermarket folks with this change. Dynojet has made good progress and are expecting to have the Power Vision working with the 2021 M8's sometime in June or July. Not much longer now.
@@DKCustomProducts please please please pleSe please. As the ol saying goes. Quote by david lee roth of van halen.... Look ill pay ya for it. Wtf....lol.
Due to the uncertainty of the m8 longevity on a 2020 RK I purchased the extended warranty for the first time. As a result there is a grey area of what will and won’t void warranty. You very informative and I appreciate your input. This kind of compares to adding a high air flow filter to today’s new car although they do have more intake sensors.
Yes. The nice thing is that you can add a great A/C to your M8 with no need for a tuner. If you need to take the bike in for warranty work it is a 15 minute job to put the OEM A/C back on it so there is no issues with the warranty.
Yes, if it is the HD extended warranty it would. There is an alternative, which will put some $ back in your pocket. HD Extended Warranty is an insurance policy. You can cancel it anytime, and get a refund of the time still left on the warranty. Then you can get a real extended warranty, that does not have so many restrictions on it. See this video for more info- th-cam.com/video/p8U4XsHyBug/w-d-xo.html
Excellent video, bought a lightly used 2017 RG Special, dealer told me he would throw in the SE street tuner and high flow air. I declined, now watching this glad I did. Saved me 800 that I can put towards Air cleaner and slip ons
Yeah, even though they will run a bit better with a tune, if you want a tuner, better to go with one like the Power Vision or FP3 than the EPA SE. Glad you enjoyed the video and found it useful. Always feel free to call or email with any questions.
Hey guys I used to read manuals I still do but as we all know there's somethings or alot of things you just can't find in books you learn from experience or DK customs keep it coming guys excellent job👍
I agree with you 100%. Off of experience, I have 3 M-8s. I've added exhaust to all of them and they run great. No deceleration popping, or running issues. I need to look at your air cleaner for my FXDR.
@@jestersasylem5622 Cobra 909 Speedsters. I have the baffles in, and there is a internal cross over in the exhaust. I would say, put them on and see how they run. Replace the exhaust gaskets at the cylinders to make sure the new pipes seal, as that will give you a false indication of a lean condition.
I just bought the screaming eagle high flow air filter for my 21 road glide special, I also added Vance & Hines torquer 450. I still have the stock tune and the bike has definitely picked up a few ponies.
Good deal! You will pick up even more by adding and EBS and TTI's to that set up. Videos on both below- th-cam.com/video/EfDeFZblMck/w-d-xo.html th-cam.com/video/b2mN7lZ1CLw/w-d-xo.html
Pulling out the baffles can certainly help with the back pressure! Here is a video you may find interesting/Useful - th-cam.com/video/pr6z00gL5Yg/w-d-xo.html Thanks for commenting! 👍
I put a screaming eagle tuner on my 2024 street bob, And since I put the tuner on the bike, the bike does seem a little smoother accelerating, and not so jerky, But it does smell really rich. I can smell the fuel in the exhaust, Where I didn't smell it before I put the tuner on.... I also had no issues with the screaming eagle tuner. (I put the stage one tune on it.) I know a lot of people do. But I didn't. And yes I did it myself.
Unfortunately for us in the United Kingdom and EU we have x4 O2 Sensors. Any kind of after market pipe fitted will require deletion of the downstream O2 Sensors fitted in the silencers. O2 Eliminators will not cure this and the bike will still throw trouble codes. This will still require the purchase of either a V&H FP4 or Dynojets PV4, though have heard of tuners having Direct Access Hardware that can perform the same process. I would note these new tunes by V&H/Dynojet retain and use the upstream O2 sensors only editing the performance end of the map. Startup/tickover and cruising is still controlled by the sensors and deleting them is no longer an option on the M8 harley. The bike will not run if try to delete the upstream O2 sensors by way of O2 Eliminators. Only a fully created Dyno Tune will allow the deletion of the upstream O2 sensors stopping the bike from running first closed loop then open loop (please excuse if thats the other way around) If indeed as you say the M8 does not run weak then why does the bike stumble around 20 -30mph? for us thats cruising between traffic control cameras (average speed cameras) I noticed this same issue with my twin cam along with excessive popping and banging (Harley map) V&H FP3 cured both the popping and banging and the slow speed stumble at the expense of a small amount of takeoff performance. I would say the M8 still runs weak during startup and cruising and that it only runs stoic when under harder acceleration at the edited performance end of the map.
Thanks for your comment. We have no experience with UK or EU models. You mention that it stumbles at low speeds (20-30 mph), that is an indication that it is too lean. Twin Cams did that here in the USA also, as well as 2007 and later Sportster...all because of being tuned too lean from the factory. That is Not the case with M8's here in the USA...and as seen in the AFR charts, they are not too lean from the factory, like the Twin Cam or EFI Sportsters. Unfortunately it sounds like it is the case for the M8's with the EU emission standards. I have seen quite a few posts like this in the different forums. I cannot attest to the accuracy of them, because we do not have access to a EU Harley, but it may be of some help to you. "I very recently bought a new 21 Softail Standard (M8) Euro 5 bike and the Dynojet PV-3B. I talked to Dynojet UK and they sent me tunes for it with the V&H Shortshots Staggered fitted. That exhaust uses the upstream O2 sensor, but not the downstream ones, hence all the questions. The tunes they sent me switch the downstream O2 sensor inputs off, so no error codes." Thank you for sharing. and please come back and share what you end up doing to solve the problem. KP
A tune may not be "required" but it definitely helps with cooling of the engine which in turn adds to its longevity. Due to the EPA and the like, bikes out of the factory run in open-loop mode during idle and lower RPM which is a problem.
On the 2017-2020 M8's they will run a little better with a good tune. Heat reduction is small...in the 3-5 degree range. The M8 is NOT lean from the factory like the Twin Cam and Sporty engines. Low RPM, low load is Closed Loop, not open loop. Here is a video that goes over that- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
@@DKCustomProducts Trying to say is Harley has no choice but to attempt to target fuel mix at 14.7 to 1. Its the law. To do this, Harley built fuel tables and then use a narrow band O2 sensor to maintain the fuel trim (Closed Loop). This is only available during idle and light load "cruise" conditions. The rest of the time the ecm just uses the appropriate setting from the fuel tables (Open Loop). In open loop the O2 sensor has no function. And this is because of the limitations of narrow band sensors. They can only function at fuel settings of 14.3:1 to 15:1 to one or there abouts. In closed loop the ecm trims the fuel based on O2 input. In open loop the ecm uses the stored fuel tables (maps). OK so how does the ecm know when its in closed loop or open loop? If 14.6 is the entry in the look up table for the applicable cell, it tries to operate in closed loop. This is call the Air Fuel Ratio Switch. And its the reason why trying to trick the ecm with resistors in the O2 sensor circuit don't always work well.
I own a ‘19 FLTRU 114ci (stock). So I’ve been running slip-Ons for 6 months and ran with no issues. I just installed an RSD A/C and I started it up and from the gate the ecu was confused and kept the idle throttle higher than normal and popping occurs. Went around the block and it back fired and runs leaner. Still continued to pop as well. Slip-ons can run without tuner but don’t add aftermarket A/c without tuner.
I think something else must be going on with your bike. We have run many 114's, including 2019's with free flowing air cleaner and free flowing exhaust with the OEM tune, and not only did they run well, but they also had good AFR. Here's another video showing this on a 2021- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html And here is a report with dyno charts at this link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
I got a V&H fp4 that was recently given to me. I called Vance&Hines and asked them about putting it on my bike. They have their afr to be between 14.1 - 14.6. Going off your video. The tuner would make my bike run leaner than just putting the exhaust on and leaving the factory map in the ecm. I'm wanting to put a Bassani road rage 2-1 exhaust on my 2022 RGS.
Take a look at this video, specifically around the 4 minute mark- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html You will see that if the FP4 puts you between 14.1 and 14.6 that this is a bit richer (not leaner) that the factory map in the ecm. Is it necessary? No, would it be a little bit better? Yes.
That is correct on M8's. Even when you add your exhaust you will still be safe with the OEM tune. Not true on Twin Cams. Thank you for your business, we appreciate it. 👍
Enjoyed this video a second time. The first, when I was converting to a high flo air box and filter. But now, you mentioned it several times in this video, but said it would be “a whole nother video”, and that is: How a hi-flo set of slip-ons, like SE Street Cannons, might change the story on needing to use a tuner, or not. Maybe you’ve already made that video discussion, and if so, I’ll keep looking thru your video list. Thanks for the good info. The forums are useful, but sometimes all over the place so it’s hard to get to the bottom of a topic such as this.
Thank you, glad you are liking the videos. The M8 is fine with free flowing exhaust and free flowing air cleaner. It is Not too lean with both, no damage will occur. However, it will run a bit stronger with an improved tune from a Power Vision or FP4. The SE Tuner will Not make it run any better. Here are a couple of videos you may find useful/interesting- th-cam.com/video/h7EdjR8l8Ag/w-d-xo.html th-cam.com/video/wQ6EzilYjiI/w-d-xo.html
Talked to Service at the dealer yesterday (just bought a bike a month ago) and the tech showed me all the Harley air cleaners in their catalogue AND he pointed out the notations next to each and every air cleaner that said: "All models require ECM Calibration with Screamin' Eagle Pro Tuner for proper installation". I told him I was thinking of adding an aftermarket Air Cleaner that wasn't Screamin" Eagle, and he said the notation still applies, with the additional note that IF I change the air cleaner it will make the engine run lean and "That" would cause damage voiding the warranty. I then asked him if the ECM would adjust without a tuner and he said "NO!". I would love to have someone convince the dealer to let me alter the air flow without telling me that I would void the warranty.
A few things to be aware of: 1. This video only applies up to model year 2020. We have not tested the 2021 to see what the calibration is on it. 2. Unfortunately, most dealership employees don't know a whole lot about the bikes they sell, sell parts for and service. It is a sad situation. 3. On 2017-2020 bikes you can see that the ECM DOES adjust by looking at the AFR in the charts shown in the link below. They show that the AFR is in a good range with the stock air cleaner and with an aftermarket HiFlow Air cleaner and Will NOT damage the engine. LINK- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
I have a 19 road glide 114.. bought used and had stock headers with Khromewerks 4.5 mufflers. No inserts. I bought a Khromewerks "hidaway" header, basically a header that follows the stock lines with stock heat shields re attached. I installed the "torque' inserts to make up for the missing cat (reverb) and fired it up. I didn't know that the stock ECM will give a margin of read and adjust. It had a screaming eagle torque cam installed with a Screaming eagle tuner flash. Cooled it off. Dont think Im gonna ruin my bike.
My 2017 CVO ran like shit until I had it tuned. Engine light for lean, engine light for rich. HD blaming it on 02 sensor!! Tune sorted it all out. Runs fantastic.
Yeah, the M8 engine in the CVO is not the standard Milwaukee-Eight engine talked about in this video. It starts out at 10.5:1 compression instead of the 10:1 compression, among other things. Running lean, then rich....sounds like HD loaded the wrong tune in it from the factory. Glad you got it running well now! 👍
@@DKCustomProducts the dealer loaded a map to make it run rich after the engine light indicated lean. Then the light came on for running rich and said it was an 02 sensor. I had to pay for the sensor and labour 2 months out of warranty. It was never the sensor!! Hence HD will never ever see my bike in their ahop again!!
@@philrobinson2327 I hear ya. Most dealerships do not have mechanics working anymore, just techs that lack the ability to use deductive reasoning. Mostly just parts replacers. Glad you got it running well.
Im running a high flow K&N air filter, with Cobra neighbor hater slip ons, on my 2020 softail standard. NO TUNE, and my bike runs like a monster. I hit a top speed of 120mph.
So adding a slip on muffler + high air air filter on a sport glide for example from 2020 will not require a tunning??? Strange some guys told me they got the "motor" light on after a couple of miles without tunning 😮
Adding a free flowing exhaust and air cleaner to an M8 does not require a tune and it will not make a check engine light come on. You could have an intake leak or an exhaust leak causing the check engine light to come on. There are many other reasons that a check engine light could come on, but since those mods were made recent, to the check engine light coming on, I would say check for a leak in your intake and exhaust first. Here is another video on the M8's not needing a tune with a little more information that you may find interesting- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html Thanks for commenting! MB
@@DKCustomProducts thanks a lot for the time you are taking to reply! Will give it a go with my RSD air filter and my cobra 909 slip on on my sport glide 😁😁😁
I have a 2018 street glide special I’m fixing to add cobra head pipes with a Vansen Hines VO 2 air intake and I’m going to be putting aftermarket slip on’s as well because I’m getting rid of the catalytic converter with the stock pipes. Wouldn’t I need to do a tune in order to correct that or with the ECM do that for me without me, having to put on a fuel pack three.
Will it run better if you tune it after doing your list of things? Yes. Will it be dangerously lean if you run the OEM tune? No. Here is a video that may be helpful/interesting to you- th-cam.com/video/0vbTkRvFa80/w-d-xo.html With your VO 2 intake and aftermarket slip-ons, you would be well served to use an External Breather System and some Thunder Torque Inserts™, otherwise whatever tune you use (OEM or aftermarket) will eventually not match the compression ratio, and the open pipes will rob power due to reversion. Video on EBS- th-cam.com/video/EfDeFZblMck/w-d-xo.html Video on Reversion- th-cam.com/video/b2mN7lZ1CLw/w-d-xo.html
My stock 2020 107ci was about 14.9 afr while cruising, and would never drop below 14.5 unless it was in the enrichment cycle under very heavy throttle. Not as lean as the TC's, but that is still way too lean even for a liquid cooled engine, much less our air/oil cooled engibes.
Yes, as shown in the chart linked below, the AFR is not quite ideal, there is a little room for improvement, BUT it is not dangerously lean like on the TC's and EFI Sportys. www.dkcustomproducts.com/media/wysiwyg/Stock_AC_with_Stock_Improved_Tune_PV.jpg
For the 2020 heritage 114, I want to remove the the cats out of my S&S slip ons. Harley said I don't need a tune with a 50 state legal slip on exhaust with stock air cleaner. But they wouldn't answer the question with the cats out of the mufflers. I don't want to tune as it voids the warranty. Also I'm looking to get 100,000 miles out of the bike at about 10k per year. I'm just looking for a better sound and longevity of the motor. The stock power is fine for me.
You do not need a tune to run safely, even if you remove the cats. Will it run better with a good tune? Yes, but it will not run bad without one, nor will you be causing any accelerated wear. You will not void the warranty by removing the cats from the S&S slip ons. You will need to use TTI's (if you are not already) with those slip-ons for more power, cooler running, and a bit better MPG. Here is a video explaining why- th-cam.com/video/pr6z00gL5Yg/w-d-xo.html
Outta curiosity... what about the RevX engine in the Street750. (2015) i picked one up for cheap and playin around with it. They did the exhaust and air, but not the oem tune.
We have done no work/testing on the 500 or 750 Street Models. So, we cannot say what the tune is like and how flexible it is. We do have a video on how the ecm works, and it does apply to the Streets. I believe you will find it interesting/useful. Here's the link to it- th-cam.com/video/0vbTkRvFa80/w-d-xo.html Thank you for commenting! MB
Thank you, glad you enjoyed! You may find this video useful- th-cam.com/video/H681dl2X_f4/w-d-xo.html Another one you may find useful- th-cam.com/video/g2VB0nBFhTQ/w-d-xo.html This written report is also useful- www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
The first one we did was with stock exhaust with the plug popped out and the cat removed. After that we have drilled and put sensors in right near the OEM sensors to verify all that info. Here is a link to a written report you may find interesting. www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm Here is a link to another video on a later model year where we drilled and tapped for the sensors- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html Thanks for the question! 👍😎👍KP
This could of saved a lot of HD riders some bucks if these facts were known thanks , yes I installed a H-D high flow air cleaner and a tuner on our 2017 Tri Glide
This info has been on our website for over 3 years...sorry we just now put it out in video format. Link to written report with all the charts- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
What about an air cleaner and new pipes? I just ordered a Vance and Hines air cleaner and short shot pipes! Not looking for more power just better sound
No need for a tune when adding free flowing intake and exhaust to a 2017-2023 M8. Time will tell if the same holds true for 2024 and later. Here is a written report, with more charts showing that these bikes are Not too lean, even with a Stage I- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Not sure if you’re still monitoring this post…I have a 2022 RG Limited 114. I want to do a stage I with, so if I’m following right, I can install my slip ons and AC and not have it tuned and still be ok?
Thanks for watching. This particular video applies to 2017-2020 models. We have another video for 2021 models, you can see it here- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html We have not tested a 2022 yet. However, the probability is high that the 2022's are the same as the 2021's in the video linked above. BUT, we cannot say that definitively until we get one on the dyno.
Very informative. I have a 2020 FXST and threw a set of Dean Speed Slip-Ons on it. Been holding off on an air cleaner because I didn’t want to spend another 5-700 on a tuner. Thanks!
Adding a 55mm to? If you are asking do you need a tune if increasing the size of the throttle body....yes, if you increase your throttle body size, or your injector size, a new tune is definitely needed. KP
Just awesome, AWESOME, stuff from DK customs, as usual. Thank you guys sooooo much for the information you make available to us Harley riders! I just traded in my iron 883 for a left over 2021 Low Rider S with the 114 M8 and I pulled my awesome DK customs 587 breather and my catch can setup off the iron before they picked it up. I was going to install the catch can but figured the breather would be useless without a tune, so thanks again for the information.
Thank you for the comment. Much appreciated, and glad you are finding the videos useful. Very happy to hear you are enjoying the parts. Enjoy your new ride!👍
If you have a 17-21 M8 you can add free flowing intake and slip on exhaust without doing a tune. The M8's are not like the Twin Cams and are not too lean. Will it run a little better with a tune? Yes. Will it cause any damage with the oem tune? No. Here is a video you may find interesting- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
I have a 2024. TriGlide Ultra. 114ci. So I can safely assume that I can install a Arlen Ness stage. 1 back plate with a OEM Air filter that it will not be too lean??
Yes you can install a Free Flowing Exhaust and Air Cleaner without retuning your 2024 TriGlide! Here is another video on the subject - th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html Devin and Kevin just recently took bikes to the dyno and are making another video with the new models that shows the tune is still good in the 2024 models. Thank you for commenting! MB
What about a softail with s slip on ? Which removes the catalytic converter but keeps the stock intake? Especially on the low rider s and low rider st?
@@DKCustomProducts to clarify, installing a slip on exhaust without a catalytic converter such as a Tab performance(which also removes the catalytic converter) on the low rider s and ST(all softail models) will not not need to be tuned and will run just fine without on the oem map, Correct? There is a lot of misinformation out there and spreading like wildfire on Facebook groups etc, reason for asking this. Thanks again for the information.
@@Mrproper86 Changing the slip-on mufflers from stock, on a M8 Softail, to free flowing with no cat, like the Tab Perf. does NOT need a different tune. The OEM tune will be fine. I am going to put a report link and a video link below showing that a tune is not needed. Your question about will it run fine...You will lose some low and mid range torque...NOT because of the tune, but because those slip-ons will allow for more reversion, which robs power. I will put a link below "reversion video" explaining why these type of slip-ons will result in a power drop, unless you use Thunder Torque Inserts™ in them. BUT, to be Clear, the OEM tune will Not be too lean and does not need to be changed for the bike to run safely. Written Report Link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm Video of how the ECM adjusts- th-cam.com/video/0vbTkRvFa80/w-d-xo.html Reversion Video- th-cam.com/video/pr6z00gL5Yg/w-d-xo.html TTI Video- th-cam.com/video/b2mN7lZ1CLw/w-d-xo.html
I added air cleaner. Harley brand. Tourque insert. No tune. Runs great. 2019 FLHT. No problem of any kind. Definitely can tell the difference. Your right, everyone else is wrong. Also use DK oil filter, wire screen. Also 1.5 tank lift.
Good to hear. Appreciate the business. Check out the following links on how to get even more out of your existing air cleaner- www.dkcustomproducts.com/overview-of-external-breather-systems-ebs.htm and a video version of the report here - th-cam.com/video/HChkevbh1Xs/w-d-xo.html
If you have a Milwaukee-8, yes, you can add free flowing exhaust and air cleaner and run the stock tune with no issue. Will it run better with a Power Vision tune? Yes! But it is not dangerously lean (like Twin Cams or Sportsters) with the OEM tune. You may find this video interesting/useful- th-cam.com/video/0vbTkRvFa80/w-d-xo.html KP
With Slip-ons the AFR stays the same. The M8 ECM does a good job of adjusting to them. The Twin Cams are an entirely different story. Here is a video you may find useful- th-cam.com/video/0vbTkRvFa80/w-d-xo.html And here is a video on a 21- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html We also had a 22 on a Dyno just a month or so ago. Put a High Flow Air Cleaner, catless header, and slip-ons on it and it was good at OEM tune. Have not done a video on it yet. All the M8's will run a little better with a great tune, but none of them are in the dangerous lean area with free flowing A/C and/or exhaust. Here's a link to a Report, with charts, that you may find interesting- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Gentlemen how’s it going- a total newbie and new to the bike world over here. Basically you don’t need a tuner if you change a full exhaust let’s say to a 2 in 1?
Welcome to the World of Harley's! That is correct, no need for a tuner on M8's from 2017-2020. Will it run better with an improved tune? Yes. Is it needed to protect the engine. No. In 2021 HD changed the ECM and we have not yet done any testing on the 2021's to see if they also changed the AFR and/or how the ECM adjusts for different circumstances.
Thanks. I am looking at a 2019 road glide with high flow air cleaner but no pipes or retune. I was worried it was run lean for 10k miles but sounds like it is just fine… correct? I plan to add slip ons and get it tuned if I get it to optimize everything
Yes, your 2019 Road Glide is not too lean from the factory and you can change to a free flowing Exhaust and or free flowing Intake and still not have to have a tune. Of course for optimum performance you will want a tune, but it is necessary. You can see a written report at this link that you may find useful/interesting - www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm Thank you for commenting! MB
Yeah, techs are not mechanics. As a rule they are parts replacers that do what the computer tells them to, without really understanding why they are doing what they do. If you find one that understands the actual why and how...and does not just parrot what someone, or something, told them...that's who you might want to let touch your bike.
@@DKCustomProducts well I may have spoken too soon. My bike started idling really high after putting in the Elite heavy breather. The diagnostic code told me it’s the ECM that needs to be adjusted. Do I need a tuner for that?
@@MadCapDarkglobe I have never installed an elite heavy breather. We have dyno tested various heavy breathers. Never got a code. What year M8 do you have? What code did you get?
@@MadCapDarkglobe That is a idle instability code. With codes for loss of idle control you need to find the source of the issue. By far the most common cause of idle issues on the M8 is either an intake leak with the plastic manifold or when the air cleaner was installed the throttle body support bracket was not removed. It can also be that during the install one of the throttle body sensor connections was bumped and is not getting a good connection now. Whenever I have an air cleaner off I unplug all the connectors, apply a bit of dielectric grease, then plug them back in and make sure they are seated well. A high idle with a P0505 code is generally not a symptom of a bad tune, but more likely a vacuum leak somewhere...so check hoses also.
Some SE products will void parts of the warranty, no matter who installs them. However, if you use EPA approved SE parts and install them correctly yourself, it will NOT void the factory warranty. I would recommend getting a real warranty (you can see video on that here- th-cam.com/video/Hqkxag-S1a8/w-d-xo.html ) That way you can do what you want to your bike, and everything is covered. One of the reasons why is that SE Stage I parts are not going to significantly improve performance or longevity of your engine. Here is a video on that subject- th-cam.com/video/GK5x3lcQvJU/w-d-xo.html Always feel free to email or call: Support@DKCustomProducts.com 662-252-8828
Yes, you will absolutely need to change the tune. The best way is via a Power Vision that you can see at this link- www.dkcustomproducts.com/dynojet-power-vision-flash-tuner-w-auto-tune-dk-pv-cmp-pkg.htm And here is a good video to watch on the subject- th-cam.com/video/isBHK-Jy7Wk/w-d-xo.html
You will not need to do a tune on an M8 after doing those mods. Will it run a bit stronger if you do? Yes. HOWEVER, you will not be too lean (like on a Twin Cam or Sportster) if you do those mods with the OEM tuen. th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
I just bought my 114 fat boy it came with cobra exhaust and I’m not sure what brand air cleaner! I don’t like how quiet it is! Would I need a tune if I removed baffles from the cobras? Or do you recommend I get a tune? Tia
If you remove the baffles from your M8 Fat Boy 114 you will not need a tune, but you will lose some low-midrange torque. You can install the TTI's to get back and even improve your low-mid range torque. You can see the TTI's at this link - www.dkcustomproducts.com/thunder-torque-inserts-c57.htm Of course for the most performance out of your bike you could get a tune, but it is not necessary and it won't hurt your bike to not have a tune. Here is a written report on M8's that you may find useful - www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm Here is a written report on Exhaust that you may also find interesting - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm Please feel free to contact us with any questions; Support@DKCustomProducts.com 662-252-8828 Thank you for commenting! 😎MB
I tried my best to look through the comments and find my answer but couldn't find it. I see all these comments asking if both a slip-on and air cleaner will work, but did not see if a full exhaust and a/c will work without a tune (for example a D&D 2-1 exhaust or a full sac head and a pair of slip-on)?
Thanks for watching our videos, and for the question. Yes, they will work with a 2017-2020 M8, we do not yet know about a 2021. Will it run better with a tuner? Yes. Do you need a tuner to prevent damage being done to the engine. NO.
That is correct. See this video- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html And this written report- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm As you will see from the dyno charts in the link above, it will run a little bit better with a good tune, but is not necessary for it to have a tune to protect the engine. It will not be too lean like the EFI Twin Cams and Sportys.
Any of our Outlaw HiFlow Air Intakes do Not void the HD Warranty on your 2022 bike. Below are two videos you may find useful/interesting. Also, here is a link to the Intakes that will not void the warranty. www.dkcustomproducts.com/air-cleaner-intake-c10.htm th-cam.com/video/M-QdwkZ3_RQ/w-d-xo.html th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
I have a 2022 Heritage 114.So I can change to a high flow air cleaner and Bassani 2 into 1 and the stock ECM will take care of it?What about decel pop on this set up? Thanks for the videos, great info
We have not tested the AFR on the 2022's, so we cannot say. We did test the 2021 and it is good. You can see that video here- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html Many folks say the 2022 is the same, but until we test it, we cannot say for sure. Decel pop varies, bike to bike, and set up to set up. Here is a video on decel pop, with some things you can do to get rid of it if you don't like it- th-cam.com/video/I_djBYYYu28/w-d-xo.html Here is a video on the ECM that you may find interesting/useful- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
Good stuff !! Just got the new Softail StreetBob with 114 M8.. I added S&S Slashcut Slipons for some sound.. I figured the ECM would accommodate the muff change, but your video adds a layer of comfort..
I purchased my Street Bob 114 four weeks ago too. I have an appointment in 2 weeks for the Stage 1 SE exhaust and tuner. Should I cancel I'm wondering. Going to cost 1600 up here in Canada. Do you think the dealer would detect if I just put my own exhaust on it and cancel the Stage 1. I have no problem taking off a after market exhaust before I take it in for service. Just don't want to lose my 5 yr warranty. I know these would definitely check the ecu for sure. ..they are a##holes like that.
@@tricgix2949 Yeah, the ECU is supposed to be checked at every Harley Dealership whenever a bike goes in. I can only tell you what is best for your bike, and what I would do. I would run whatever exhaust I wanted, that performed well, along with an air cleaner that was free flowing and did not put hot, oily, oxygen depleted air back into the intake and combustion chambers. Then, IF, I ever had to take it in for warranty work I would put the stock air cleaner and mufflers back on. There is not going to be a very big gain at all from the SE exhaust and tuner, not worth the $ to me. Here is a video you may find useful- th-cam.com/video/GK5x3lcQvJU/w-d-xo.html
@@tricgix2949 The bike had enough HP and Torque for me, I just wanted a bit of sound.. Put the S&S Slashcut Slipons with DB Killers removed. They arent obnoxious at al.. Just enough sound for me. Now about issues with warranty. My dealer doesnt have a concern with slip-ons. The ECM doesnt recognize that. It does recognize a tuner. It depends what your needs are.. For me, $330 mufflers was all I wanted.. Its plenty quick enough for my riding style.. My 03 Dyna with Stage 2 upgrades is my play bike. But the Streetbob is about as quick or ?
No, you do not need a tune for your 17 M8 if you change to a free flowing exhaust and Hiflow Air Cleaner. Here is a link to a written report on the subject that you may find helpful- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm Thanks for commenting! 😎 MB
Hi there thanks for the great videos ! Im about to install no CAT dual headers with straight through fishtails but still using oem air filter & intake on my 2017 road king m8 , do you think my bike will show some lights after & need tuning ? Or not ? Many thanks
As long as you install your OEM O2 sensors in your new exhaust, you are good to go. No lights, no tuning needed. Glad you are enjoying the videos. 👍😎👍 If you put some Thunder Torque Inserts in your new exhaust, I think you will be well pleased with the Performance Gain. Here is a link to some info on them- www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
You do not need a tune for your M8. The M8's do run great from the factory, and still run great after upgrading to a free flowing exhaust and HiFlow Air Cleaner. Getting an after market tune would maximize the performance, but is not necessary. You can see a more another video on this subject at this link - th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html You can also see a written report we've done at this link - www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm You can see more about exhaust at this link - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm Thank you for commenting! MB
I have a 2018 fxbb softail Streetbob I just bought this bike a little while ago and it came with a tbr pipe on it . I was wondering if I out an aircleaner on it I still don’t need to get a tune the stock tune is acceptable ?
That is correct! On your 2018 Streetbob your AFR is not too lean from the factory and you can upgrade to a free flowing Exhaust and Air Cleaner without having to re-tune. Of course if you re-tune you will get more performance, but it is not going to hurt your bike to make those changes and keep the OEM tune. Thank you for commenting! 😎MB
Yes, you can change the AFR if you have one of the tuners at the links below. It will run a bit stronger, factory stock. See charts at this link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm Tuner links- www.dkcustomproducts.com/dynojet-power-vision-flash-tuner-w-auto-tune-dk-pv-cmp-pkg.htm www.dkcustomproducts.com/v-h-fuelpak-fp3-efi-flash-tuner-w-auto-tune-for-stage-i-ii-s-dk-vh-fp3.htm
That is correct. Will it run better if you do a tune? Yes. Will you damage it from running the factory tune with those components. Nope...it is not too lean like the Twin Cams.
@@jesselegz4312 It is fine with a header and no cat. No need to tune. Will it run better with a tune? Yep. But it will not damage it using the factory tune.
I know this is a recurring question, but the dealerships and some indy shops, getting conflicting info. I have a 2020 107 street glide. I have a harley st air cleaner, decanted stock head pipe and s&s grand national slip ons and no tuner. I was told this would destroy my engine, but from what I read on here I should be good??? Please help
Yes, there is a lot of confusing info out there. This is something we have researched and tested extensively. M8's from 2017 thru 2023 are NOT too lean, whether in OEM condition, Or with free flowing intake and exhaust. Here is another video on the subject, and below that link there is a report showing that the AFR's are in the safe range, even with free flowing intake and exhaust. th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm HOWEVER, they do run too hot for their own good (but this is NOT because of the tune). Here is a video on low and no cost ways to cool it down- th-cam.com/video/o3T3yA9BKwE/w-d-xo.html Here is a written report with lots of info on why and how to cool your Harley down- www.dkcustomproducts.com/why-how-to-cool-down-the-twin-cam-engine-part-i-dk-cl-tc-dn-1.htm And Here is a video of something your Harley will love for you to do for it- th-cam.com/video/EfDeFZblMck/w-d-xo.html
Im having to change my tune to make it more rich. Ive done a LOT of changes chasing the heat problem on my 2020 RG. even stock it was HOT. after doing a stage one complete it helped a LITTLE bit. no cat headers, free flowing for the most part. but engine temp is in the 330s on the interstate. this is about 70 degrees higher than they say it should run. mechanic said mostly likely increasing the fuel just even a bit could drop it 30-40 degrees. which at least makes it ridable even if only 30 degrees are dropped. Im having to put my foot on the right side peg any time I am not actively using the break cause it'll literally blister my ankle through my boot.
I know exactly what you are talking about. 10's of thousands have experienced the same thing, including myself. We have made an entire video series on the subject. We also have a written report on the subject. Links to both are below. th-cam.com/play/PLb3bvZgbH92_3s-2vv63QggFJ3nteFd_C.html www.dkcustomproducts.com/why-how-to-cool-down-the-twin-cam-engine-part-i-dk-cl-tc-dn-1.htm btw, going from the OEM tune on your M8 to a good tune will drop temps 10-15 degrees. Not sure if you can get a 30-40 degree drop going from the OEM tune to a different one...it is possible to get more than 15 with a tune that is super rich (richer than it should be). Check out the links above to see how to cool it down and have it run right!
You do not. The M8's are not lean from the factory like the Twin Cams and Sportsters. You can add free flowing intake and free flowing exhaust and the OEM tune will Not be too lean. Here is a written report with many charts on the subject- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm As you can see from some of the charts, it will run a little bit better with a tune, but it is not necessary.
We offer two tuners that will work with your bike. You can see those options Power Vision 3B and FP4 at this link www.dkcustomproducts.com/efi-tuners-c74.htm . You can email our customer service at support@dkcustomproducts.com for any questions you might have about the tuners or the capabilities! Thank you for watching!
You will pick up a little bit of power by going to a 2-1 header. You will have far much less heat radiating from the exhaust, because of the delete of the cat. You will not need a new tune to protect the engine from running too lean, however, it will run better with a tune.
All Sportys since 2007 run lean from the factory, and even in stock condition they benefit greatly from a tune....even the XL-ViED, that is linked below, will improve the lean condition AND will get rid of that little stutter/hesitation at low RPM. www.dkcustomproducts.com/xl-vied-fuel-enrichment-harley-efi-plug-n-play-2014-up-sportster-dk-xlvied-14-nr.htm
so if i add a K&N RK-3955 Intake System-Harley Davidson, on my 2018 road glide i won't have to have a tune for it. add would i be able to use your transformer kit with it
No you would not need to change your tune for an intake upgrade... That air cleaner will not fit with the Transformer. If you have not already ordered that Air Intake here is a very useful video to show you what will fit with the transformer at this link - th-cam.com/video/_XYXScy3j0Q/w-d-xo.html After looking at the K&N RK-3955 it looks like you would need one of our DIY External Breather Kits seen at this link - www.dkcustomproducts.com/diy-external-breather-systems-544.htm Please feel free to contact us with any questions you might have; Support@DKCustomProducts.com 662-252-8828 Thank you for commenting! 😎
@bob levesque Good question. You may get some decel pop, it all depends on which slip-ons, which air cleaner, how you ride, what elevation, etc. Here is a really good video on what causes decel pop- th-cam.com/video/I_djBYYYu28/w-d-xo.html It will run with less low and mid range torque because of reversion. If you put in some Thunder Torque Inserts™ they will increase your low and mid range power to More than you have with the stock pipes. Video on that here- th-cam.com/video/b2mN7lZ1CLw/w-d-xo.html
So, I purchased a 2022 Heritage Classic 114... It comes with a High Flow Air Intake and Filter from the Factory. I'm wanting to add Cobra Neighbor Haters Mufflers... Will I need to tune my 114???
It is an OEM high flow, but it is still feeding hot, oily, oxygen depleted air into the throttle body and combustion chambers. See video link below on why that is so detrimental. That said, the OEM tune will keep the AFR is the safe range, even with the addition of the neighbor haters. Eventually, because of the hot, oily air, it will need to be tuned to continue running well. EBS Video- th-cam.com/video/EfDeFZblMck/w-d-xo.html Here is another video you may find useful- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html&t
Thank you, glad you enjoyed. We have a video on the 2021 at this link- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html You can use a free flowing air cleaner and free flowing exhaust with your OEM tune. No tune is needed to keep you from being so lean that you cause damage. It will run a little bit stronger with a good tune, but it is NOT necessary to have a good running bike or to keep it from being too lean. The OEM M8 tune is much better than the OEM tune for Twin Cams or Sportster.
Yes, absolutely. The 2023's are the same as the 17-20's in that they are not too lean. Here is a video on them- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
Thank you for all the info its been very helpful. I have a 2021 street glide with a 107. If i add a high flow intake, delete my catalytic and and slip ons i don’t have to get a tune?
Question Decatted stock header, cobra neighbor hater slip-ons stock air filter. Is SGS 2022 M8 running lean now. Does he have to tune it now.. He was told by a shop over the phone it's running lean now. Without them seeing or hearing the bike..what tuner do you suggest. Not doing cams
Unless he has a leak somewhere, he should not be running too lean. All M8's (2017-2023 - 2024's not here yet) can have free flowing intake and exhaust and run the OEM tune without being too lean. Here is another video on the subject- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html If he still wants a tuner, we prefer the Power Vision, but many folks like the FP4 that works with a smartphone. You can see them both at this link- www.dkcustomproducts.com/efi-tuners-c74-317.htm
Nothing to be upset about. The power vision is a great tuner and even though the M8's do not need a tune, a good tune will only improve your performance. Thank you for commenting! 😎 MB
Yes, the OEM tune will adjust. Below are links to a written report and to a video on the subject. th-cam.com/video/0vbTkRvFa80/w-d-xo.html www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Congrats on your new ride! 👍 All of the 587, 606, 636v & 828 air cleaners at the following link will fit your bike. They will all make for better performance. It is really just a matter of which one you like the looks of the best. None of them will void your warranty. (some Dealerships may say that they will, but the FTC just came down on Harley hard for saying things like that, see the video link below) www.dkcustomproducts.com/air-cleaner-intake-c10-327.htm th-cam.com/video/M-QdwkZ3_RQ/w-d-xo.html
Just purchased a 2023 street glide M8 107 and got the Vance and hinds big radius and a open flow k&n intake is it okay to run the bike without a tune for a while or will it mess up the motor?
You can go with a free flowing intake and exhaust and still not be too lean on your 2023 SG. Here is a video relevant to your year bike- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html Here is another video, about how the ECM adjusts, that you may find useful/interesting- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
thanks a lot for putting this info out there guys! 👍 really goo stuff! I really wanted to see where the M8 stock tune AFR's were running, but don't have "easy access" to a dyno. this is great news for a lot of people. I'm guessing that a higher flow air cleaner and slip-ons will potentially cool it down some too?
We have charts showing where the stock AFR tunes are running, you can seem them at this link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm The higher flow air cleaner and slip-ons will cool it a bit. Make sure to run an External Breather System on the air cleaner...that will do more to cool it down than the high flow of the air cleaner. Also, stop the reversion in the slip ons, that will do more to cool it down than the free flow aspect of the slip ons. There is a whole series on why and how to cool down an M8 at this link- th-cam.com/play/PLb3bvZgbH92_3s-2vv63QggFJ3nteFd_C.html
Ok i got a 2020 breakout so you are saying i can go with a SE extreme AC and a super trapped bootlegger exhaust and do not need a tune till the next step of put a cam.
That is correct. Will it run better if you do a tune? Yes. Will you damage it from running the factory tune with those components. Nope...it is not too lean...especially with that air cleaner that is shooting hot oily air into the intake.
I have to ask, if an aftermarket air cleaner does not change the AFR.... then was the stock air cleaner flowing enough? No change? Following that, then maybe a cam, bigger cylinders would then require a better air cleaner since it would then flow higher volumes?
The aftermarket air cleaner clearly makes a big difference. The ECM adjusts the AFR to keep it in a good range, resulting in a nice bump in power. Look at this dyno chart to see a 10% increase in HP by just changing to a good air cleaner- www.dkcustomproducts.com/media/wysiwyg/Stock_Stock_587.jpg There are more charts and info on the subject at this link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
@@vf12497439 Yeah, the M8' start at a good AFR, and then with roughly 20% adjustment available in the ECM it does really well with up to free flowing exhaust and intake. You may like this video, that shows HOW the ECM adjusts- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
Ps: Doc Harley recommends the same and in a response afterwards noted there is no selection in the Harley tuner for just an air cleaner upgrade!! Good job !!
Thank you. Yes, there are still a bunch of people (individuals and dealerships) that are perpetuating the falsehood that the M8 has the same lean problem as the Twin Cam. It does not.
We have even removed some comments from this video of people that still posted that the M8 needs to have a tuner if a free flowing A/C and/or exhaust are added. We don't generally remove comments, but letting them stay can just further confuse what should be clear...a tuner is NOT needed to correct a too lean issue, since they are not too lean.
@@DKCustomProducts hey! What’s the deal with the 2021 m8? What’s the best option? Slip ons and a PV tune? Is the stock cleaner all good for a stage one? What’s the best way forward. Don’t want something too loud. Rinehart DBX45?
@@Elmuchacho17 Here is the video on the 2021 M8 models- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
Don't know which 2021 M8 you have, but one of the Outlaw Air Cleaners (they all come with an EBS) will significantly improve performance over the stock air cleaner. Here's a video showing just one of them- th-cam.com/video/KtbdOoVNL9g/w-d-xo.html
You can run an Outlaw Air Cleaner and open exhaust with the stock tune. With a PV tune it will improve performance...but not as much as the air cleaner will improve it, and no damage will occur if you run the OEM tune.
Regarding exhaust, that is a tricky question. Everyone's ears are different. This is the best advice we can give for someone not wanting to loud of exhaust-
th-cam.com/video/H681dl2X_f4/w-d-xo.html
@Scooby doo Just put the DBX45 On my 21 roadglide. Totally change the way my bike runs And it sounds excellent. Check out direct cycle parts. Every place wanted $755 shipped with tax. Direct cycle Parts $579. No tax no shipping. I saved the $179. Just ordered the screaming eagle heavy air breather. I'm gonna slap it on without a tune and see what happens
Thank you! I have a 2021 Road glide with that 3rd 02 sensor.
Thanks for the advice guys. I have an aftermarket air cleaner and Freedom pipes. When l initially did it the bike was cold and it was revving unusually high. Gave it a about 10min and the bike automatically adjusted itself to the higher air intake and the free flowing exhaust system. My friends thought I was crazy. Thanks for making that clear about the M8 114. Now my friends are disappointed because they spent a small fortune getting tunes etc. Anyhow, love the channel and the straight forward information you guys give. It's refreshing to see. Cheers from Melbourne Australia!
Glad that you like the videos and have found them helpful. Thank you for your support and for commenting! MB
Your more than welcome. You guys are great. You put myths to bed and save people money. Thanks again guys. You are doing great work. I enjoy your videos very much. Regards Harry from Melbourne Australia!
Thank you! 👍😎👍 KP
I so needed to see this video. Would love to see progression videos to see AFR results when changing slip-ons and then a full catless header. Keep up the great work guys.
You might like the video linked below. One of the bikes in it had our free flowing intake and slip-ons...if I remember correctly it still had the OEM header with the cat in it.
But we have done many runs with and then without the cat, it does not make a difference in the AFR...video on cat at the bottom below.
th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
th-cam.com/video/ks39Gwb3NdI/w-d-xo.html
This video applies to all M8's from 2017-2020.
In 2021 HD changed the ECM. The video on 2021's is here- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
*THE PV-3B FOR 2021 M8'S IS NOW AVAILABLE.
ALL DETAILS CAN BE SEEN AT THIS LINK- www.dkcustomproducts.com/dynojet-power-vision-flash-tuner-w-auto-tune-dk-pv-cmp-pkg.htm
I am dealing with this dilemma now. I just bought a 21 lowrider s and had no clue the bikes changed ECM. Now I'm having a hard time deciding on installing a full exhaust or having to wait until I can get a tuner. Additionally i can't even find any info on ayone who makes a tuner for this model year bike. All I know is I hate the sound of the exhaust from factory and was really looking forward to installing a S&S grand national 2-2.
@@sickinmyduck4017 Yeah, Harley has tried to lock out all aftermarket folks with this change. Dynojet has made good progress and are expecting to have the Power Vision working with the 2021 M8's sometime in June or July. Not much longer now.
Well do it.... test 2021 asap.... we need help asap guys... please.. git going on it.
@@phillipmckeownakalucifer.6689 I wish it were that easy. :)
@@DKCustomProducts please please please pleSe please. As the ol saying goes. Quote by david lee roth of van halen.... Look ill pay ya for it. Wtf....lol.
Best explanation I have seen yet on a high flow a/c in a M8 👍
Thanks. Glad you liked it. 👍
Due to the uncertainty of the m8 longevity on a 2020 RK I purchased the extended warranty for the first time. As a result there is a grey area of what will and won’t void warranty. You very informative and I appreciate your input. This kind of compares to adding a high air flow filter to today’s new car although they do have more intake sensors.
Yes. The nice thing is that you can add a great A/C to your M8 with no need for a tuner. If you need to take the bike in for warranty work it is a 15 minute job to put the OEM A/C back on it so there is no issues with the warranty.
Yes, if it is the HD extended warranty it would. There is an alternative, which will put some $ back in your pocket. HD Extended Warranty is an insurance policy. You can cancel it anytime, and get a refund of the time still left on the warranty. Then you can get a real extended warranty, that does not have so many restrictions on it. See this video for more info- th-cam.com/video/p8U4XsHyBug/w-d-xo.html
Excellent video, bought a lightly used 2017 RG Special, dealer told me he would throw in the SE street tuner and high flow air. I declined, now watching this glad I did. Saved me 800 that I can put towards Air cleaner and slip ons
Yeah, even though they will run a bit better with a tune, if you want a tuner, better to go with one like the Power Vision or FP3 than the EPA SE.
Glad you enjoyed the video and found it useful. Always feel free to call or email with any questions.
Hey guys I used to read manuals I still do but as we all know there's somethings or alot of things you just can't find in books you learn from experience or DK customs keep it coming guys excellent job👍
Thanks man. Glad you're finding the videos useful. Appreciate the comment.
I agree with you 100%. Off of experience, I have 3 M-8s. I've added exhaust to all of them and they run great. No deceleration popping, or running issues. I need to look at your air cleaner for my FXDR.
Good to hear. Feel free to email or call with any questions. I think you'll like the benefits of one our our intake kits. 👍
what exhaust are you running on your fxdr i just got some short shots and been hearing you need a tuner for it
@@jestersasylem5622 Cobra 909 Speedsters. I have the baffles in, and there is a internal cross over in the exhaust. I would say, put them on and see how they run. Replace the exhaust gaskets at the cylinders to make sure the new pipes seal, as that will give you a false indication of a lean condition.
@@jestersasylem5622 and you don't need a tune unless you need more power.
@@DKCustomProducts for the breather?
I just bought the screaming eagle high flow air filter for my 21 road glide special, I also added Vance & Hines torquer 450. I still have the stock tune and the bike has definitely picked up a few ponies.
Good deal!
You will pick up even more by adding and EBS and TTI's to that set up.
Videos on both below-
th-cam.com/video/EfDeFZblMck/w-d-xo.html
th-cam.com/video/b2mN7lZ1CLw/w-d-xo.html
Good to know, thank you for sharing the personal experience.
Awesome! No one else would answer this question!
Glad you like the video! We do what we can to give good accurate information to the Harley riders!
Thanks for commenting! 😎
@@DKCustomProducts I pulled out my baffles as well and it rides fine! I think the industry just wants to sell more Dyno's
Pulling out the baffles can certainly help with the back pressure!
Here is a video you may find interesting/Useful - th-cam.com/video/pr6z00gL5Yg/w-d-xo.html
Thanks for commenting! 👍
I put a screaming eagle tuner on my 2024 street bob, And since I put the tuner on the bike, the bike does seem a little smoother accelerating, and not so jerky, But it does smell really rich. I can smell the fuel in the exhaust, Where I didn't smell it before I put the tuner on.... I also had no issues with the screaming eagle tuner. (I put the stage one tune on it.) I know a lot of people do. But I didn't. And yes I did it myself.
I am glad that the Screaming Eagle Tuner is working for you! Thank you for commenting! MB
Unfortunately for us in the United Kingdom and EU we have x4 O2 Sensors. Any kind of after market pipe fitted will require deletion of the downstream O2 Sensors fitted in the silencers. O2 Eliminators will not cure this and the bike will still throw trouble codes. This will still require the purchase of either a V&H FP4 or Dynojets PV4, though have heard of tuners having Direct Access Hardware that can perform the same process. I would note these new tunes by V&H/Dynojet retain and use the upstream O2 sensors only editing the performance end of the map. Startup/tickover and cruising is still controlled by the sensors and deleting them is no longer an option on the M8 harley. The bike will not run if try to delete the upstream O2 sensors by way of O2 Eliminators. Only a fully created Dyno Tune will allow the deletion of the upstream O2 sensors stopping the bike from running first closed loop then open loop (please excuse if thats the other way around) If indeed as you say the M8 does not run weak then why does the bike stumble around 20 -30mph? for us thats cruising between traffic control cameras (average speed cameras) I noticed this same issue with my twin cam along with excessive popping and banging (Harley map) V&H FP3 cured both the popping and banging and the slow speed stumble at the expense of a small amount of takeoff performance. I would say the M8 still runs weak during startup and cruising and that it only runs stoic when under harder acceleration at the edited performance end of the map.
Thanks for your comment.
We have no experience with UK or EU models.
You mention that it stumbles at low speeds (20-30 mph), that is an indication that it is too lean. Twin Cams did that here in the USA also, as well as 2007 and later Sportster...all because of being tuned too lean from the factory.
That is Not the case with M8's here in the USA...and as seen in the AFR charts, they are not too lean from the factory, like the Twin Cam or EFI Sportsters.
Unfortunately it sounds like it is the case for the M8's with the EU emission standards.
I have seen quite a few posts like this in the different forums. I cannot attest to the accuracy of them, because we do not have access to a EU Harley, but it may be of some help to you.
"I very recently bought a new 21 Softail Standard (M8) Euro 5 bike and the Dynojet PV-3B.
I talked to Dynojet UK and they sent me tunes for it with the V&H Shortshots Staggered fitted. That exhaust uses the upstream O2 sensor, but not the downstream ones, hence all the questions. The tunes they sent me switch the downstream O2 sensor inputs off, so no error codes."
Thank you for sharing. and please come back and share what you end up doing to solve the problem.
KP
Great info...too many shops want to rip off riders with false tuning stories.
There are some good tuning shops out there, but there are far more that I would not trust with my bike...and it can be difficult to know who is who.
A tune may not be "required" but it definitely helps with cooling of the engine which in turn adds to its longevity. Due to the EPA and the like, bikes out of the factory run in open-loop mode during idle and lower RPM which is a problem.
On the 2017-2020 M8's they will run a little better with a good tune. Heat reduction is small...in the 3-5 degree range.
The M8 is NOT lean from the factory like the Twin Cam and Sporty engines.
Low RPM, low load is Closed Loop, not open loop. Here is a video that goes over that-
th-cam.com/video/0vbTkRvFa80/w-d-xo.html
@@DKCustomProducts Trying to say is Harley has no choice but to attempt to target fuel mix at 14.7 to 1. Its the law. To do this, Harley built fuel tables and then use a narrow band O2 sensor to maintain the fuel trim (Closed Loop). This is only available during idle and light load "cruise" conditions. The rest of the time the ecm just uses the appropriate setting from the fuel tables (Open Loop). In open loop the O2 sensor has no function. And this is because of the limitations of narrow band sensors. They can only function at fuel settings of 14.3:1 to 15:1 to one or there abouts. In closed loop the ecm trims the fuel based on O2 input. In open loop the ecm uses the stored fuel tables (maps).
OK so how does the ecm know when its in closed loop or open loop? If 14.6 is the entry in the look up table for the applicable cell, it tries to operate in closed loop. This is call the Air Fuel Ratio Switch. And its the reason why trying to trick the ecm with resistors in the O2 sensor circuit don't always work well.
@@DKCustomProducts 3-5 degrees over the course of +75,000 miles... I'll take it coupled with other additions (tank lift, Mighty Mite, etc.).
@@militaryminedid2011 True that, every little bit helps, and a lot of little things add up to big benefits!
@@militaryminedid2011 Yes, most of what you said is in the video... th-cam.com/video/0vbTkRvFa80/w-d-xo.html
I own a ‘19 FLTRU 114ci (stock). So I’ve been running slip-Ons for 6 months and ran with no issues. I just installed an RSD A/C and I started it up and from the gate the ecu was confused and kept the idle throttle higher than normal and popping occurs. Went around the block and it back fired and runs leaner. Still continued to pop as well. Slip-ons can run without tuner but don’t add aftermarket A/c without tuner.
I think something else must be going on with your bike. We have run many 114's, including 2019's with free flowing air cleaner and free flowing exhaust with the OEM tune, and not only did they run well, but they also had good AFR.
Here's another video showing this on a 2021- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
And here is a report with dyno charts at this link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
You have a leak with your new AC not installed properly. Check your gaskets ect. What you described is Air Cleaner install issue.
@@Luckky-13 Very likely, could also be an exhaust leak. Thanks for the add.
I bought a 2021 114 streetbob. Put a k&n stock replacement filter. Love it.
👍
I got a V&H fp4 that was recently given to me. I called Vance&Hines and asked them about putting it on my bike. They have their afr to be between 14.1 - 14.6. Going off your video. The tuner would make my bike run leaner than just putting the exhaust on and leaving the factory map in the ecm. I'm wanting to put a Bassani road rage 2-1 exhaust on my 2022 RGS.
Take a look at this video, specifically around the 4 minute mark- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
You will see that if the FP4 puts you between 14.1 and 14.6 that this is a bit richer (not leaner) that the factory map in the ecm. Is it necessary? No, would it be a little bit better? Yes.
Just to make sure I understand, I bought your transformer and 606 hi-flo. I do not need to tune after install, until I get my new exhaust.
That is correct on M8's. Even when you add your exhaust you will still be safe with the OEM tune.
Not true on Twin Cams.
Thank you for your business, we appreciate it. 👍
AHA! I am now gonna take the day to install my TBR turnout and S&S Stinger! Still some good riding up here in the northeast before the snow flies.
Have fun!
Enjoyed this video a second time. The first, when I was converting to a high flo air box and filter. But now, you mentioned it several times in this video, but said it would be “a whole nother video”, and that is: How a hi-flo set of slip-ons, like SE Street Cannons, might change the story on needing to use a tuner, or not. Maybe you’ve already made that video discussion, and if so, I’ll keep looking thru your video list. Thanks for the good info. The forums are useful, but sometimes all over the place so it’s hard to get to the bottom of a topic such as this.
Thank you, glad you are liking the videos. The M8 is fine with free flowing exhaust and free flowing air cleaner. It is Not too lean with both, no damage will occur. However, it will run a bit stronger with an improved tune from a Power Vision or FP4. The SE Tuner will Not make it run any better.
Here are a couple of videos you may find useful/interesting-
th-cam.com/video/h7EdjR8l8Ag/w-d-xo.html
th-cam.com/video/wQ6EzilYjiI/w-d-xo.html
Talked to Service at the dealer yesterday (just bought a bike a month ago) and the tech showed me all the Harley air cleaners in their catalogue AND he pointed out the notations next to each and every air cleaner that said: "All models require ECM Calibration with Screamin' Eagle Pro Tuner for proper installation". I told him I was thinking of adding an aftermarket Air Cleaner that wasn't Screamin" Eagle, and he said the notation still applies, with the additional note that IF I change the air cleaner it will make the engine run lean and "That" would cause damage voiding the warranty. I then asked him if the ECM would adjust without a tuner and he said "NO!".
I would love to have someone convince the dealer to let me alter the air flow without telling me that I would void the warranty.
A few things to be aware of:
1. This video only applies up to model year 2020. We have not tested the 2021 to see what the calibration is on it.
2. Unfortunately, most dealership employees don't know a whole lot about the bikes they sell, sell parts for and service. It is a sad situation.
3. On 2017-2020 bikes you can see that the ECM DOES adjust by looking at the AFR in the charts shown in the link below. They show that the AFR is in a good range with the stock air cleaner and with an aftermarket HiFlow Air cleaner and Will NOT damage the engine.
LINK- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
I have a 19 road glide 114.. bought used and had stock headers with Khromewerks 4.5 mufflers. No inserts. I bought a Khromewerks "hidaway" header, basically a header that follows the stock lines with stock heat shields re attached. I installed the "torque' inserts to make up for the missing cat (reverb) and fired it up. I didn't know that the stock ECM will give a margin of read and adjust. It had a screaming eagle torque cam installed with a Screaming eagle tuner flash. Cooled it off. Dont think Im gonna ruin my bike.
You should be good! 👍
My 2017 CVO ran like shit until I had it tuned. Engine light for lean, engine light for rich. HD blaming it on 02 sensor!! Tune sorted it all out. Runs fantastic.
Yeah, the M8 engine in the CVO is not the standard Milwaukee-Eight engine talked about in this video. It starts out at 10.5:1 compression instead of the 10:1 compression, among other things.
Running lean, then rich....sounds like HD loaded the wrong tune in it from the factory.
Glad you got it running well now! 👍
@@DKCustomProducts the dealer loaded a map to make it run rich after the engine light indicated lean. Then the light came on for running rich and said it was an 02 sensor. I had to pay for the sensor and labour 2 months out of warranty. It was never the sensor!! Hence HD will never ever see my bike in their ahop again!!
@@philrobinson2327 I hear ya. Most dealerships do not have mechanics working anymore, just techs that lack the ability to use deductive reasoning. Mostly just parts replacers. Glad you got it running well.
Im running a high flow K&N air filter, with Cobra neighbor hater slip ons, on my 2020 softail standard. NO TUNE, and my bike runs like a monster. I hit a top speed of 120mph.
Great to hear you're enjoying your ride!
So adding a slip on muffler + high air air filter on a sport glide for example from 2020 will not require a tunning??? Strange some guys told me they got the "motor" light on after a couple of miles without tunning 😮
Adding a free flowing exhaust and air cleaner to an M8 does not require a tune and it will not make a check engine light come on.
You could have an intake leak or an exhaust leak causing the check engine light to come on.
There are many other reasons that a check engine light could come on, but since those mods were made recent, to the check engine light coming on, I would say check for a leak in your intake and exhaust first.
Here is another video on the M8's not needing a tune with a little more information that you may find interesting- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
Thanks for commenting! MB
@@DKCustomProducts thanks a lot for the time you are taking to reply! Will give it a go with my RSD air filter and my cobra 909 slip on on my sport glide 😁😁😁
You are most welcome! Good Luck!!! 👍
Thanks for uploading this video. Very informative.
Thanks, glad you found it useful.
I have a 2018 street glide special I’m fixing to add cobra head pipes with a Vansen Hines VO 2 air intake and I’m going to be putting aftermarket slip on’s as well because I’m getting rid of the catalytic converter with the stock pipes. Wouldn’t I need to do a tune in order to correct that or with the ECM do that for me without me, having to put on a fuel pack three.
Will it run better if you tune it after doing your list of things? Yes. Will it be dangerously lean if you run the OEM tune? No.
Here is a video that may be helpful/interesting to you- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
With your VO 2 intake and aftermarket slip-ons, you would be well served to use an External Breather System and some Thunder Torque Inserts™, otherwise whatever tune you use (OEM or aftermarket) will eventually not match the compression ratio, and the open pipes will rob power due to reversion.
Video on EBS- th-cam.com/video/EfDeFZblMck/w-d-xo.html
Video on Reversion- th-cam.com/video/b2mN7lZ1CLw/w-d-xo.html
Good info on this never ending topic!
Thanks!
My stock 2020 107ci was about 14.9 afr while cruising, and would never drop below 14.5 unless it was in the enrichment cycle under very heavy throttle. Not as lean as the TC's, but that is still way too lean even for a liquid cooled engine, much less our air/oil cooled engibes.
Yes, as shown in the chart linked below, the AFR is not quite ideal, there is a little room for improvement, BUT it is not dangerously lean like on the TC's and EFI Sportys.
www.dkcustomproducts.com/media/wysiwyg/Stock_AC_with_Stock_Improved_Tune_PV.jpg
Thank you for the video. Guys like you taking the time to do this are much appreciated for the do it your selfers.
Thanks for watching, and great to hear you are finding the videos useful! 👍
For the 2020 heritage 114, I want to remove the the cats out of my S&S slip ons. Harley said I don't need a tune with a 50 state legal slip on exhaust with stock air cleaner. But they wouldn't answer the question with the cats out of the mufflers. I don't want to tune as it voids the warranty. Also I'm looking to get 100,000 miles out of the bike at about 10k per year. I'm just looking for a better sound and longevity of the motor. The stock power is fine for me.
You do not need a tune to run safely, even if you remove the cats. Will it run better with a good tune? Yes, but it will not run bad without one, nor will you be causing any accelerated wear.
You will not void the warranty by removing the cats from the S&S slip ons.
You will need to use TTI's (if you are not already) with those slip-ons for more power, cooler running, and a bit better MPG. Here is a video explaining why- th-cam.com/video/pr6z00gL5Yg/w-d-xo.html
That is great knowledge from DK. exactly things I want and need to know. 2021 FLHP, RH slip-ons, K&N hi-flow, no tune and runs great. Thank you.
Thanks for the comment.
Enjoy your ride! 👍
I have 2019 tri glide, de`cat, cobra 909, and going to change to hi`flow filter....no tune???
That is correct.
Outta curiosity... what about the RevX engine in the Street750. (2015) i picked one up for cheap and playin around with it. They did the exhaust and air, but not the oem tune.
We have done no work/testing on the 500 or 750 Street Models. So, we cannot say what the tune is like and how flexible it is.
We do have a video on how the ecm works, and it does apply to the Streets. I believe you will find it interesting/useful. Here's the link to it- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
Thank you for commenting! MB
great info ! i hope you'll do the same kind of analysis on a few popular exhaust systems/slip ons .
Thank you, glad you enjoyed!
You may find this video useful- th-cam.com/video/H681dl2X_f4/w-d-xo.html
Another one you may find useful- th-cam.com/video/g2VB0nBFhTQ/w-d-xo.html
This written report is also useful- www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
How are you getting the sniffer up to the sensors with stock pipes? I did not see anything but an air cleaner mentioned.
The first one we did was with stock exhaust with the plug popped out and the cat removed. After that we have drilled and put sensors in right near the OEM sensors to verify all that info. Here is a link to a written report you may find interesting. www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Here is a link to another video on a later model year where we drilled and tapped for the sensors- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
Thanks for the question! 👍😎👍KP
This could of saved a lot of HD riders some bucks if these facts were known thanks , yes I installed a H-D high flow air cleaner and a tuner on our 2017 Tri Glide
This info has been on our website for over 3 years...sorry we just now put it out in video format. Link to written report with all the charts- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Thanks
What about an air cleaner and new pipes? I just ordered a Vance and Hines air cleaner and short shot pipes! Not looking for more power just better sound
No need for a tune when adding free flowing intake and exhaust to a 2017-2023 M8. Time will tell if the same holds true for 2024 and later.
Here is a written report, with more charts showing that these bikes are Not too lean, even with a Stage I- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Not sure if you’re still monitoring this post…I have a 2022 RG Limited 114. I want to do a stage I with, so if I’m following right, I can install my slip ons and AC and not have it tuned and still be ok?
Thanks for watching.
This particular video applies to 2017-2020 models.
We have another video for 2021 models, you can see it here- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
We have not tested a 2022 yet. However, the probability is high that the 2022's are the same as the 2021's in the video linked above. BUT, we cannot say that definitively until we get one on the dyno.
Very informative. I have a 2020 FXST and threw a set of Dean Speed Slip-Ons on it. Been holding off on an air cleaner because I didn’t want to spend another 5-700 on a tuner. Thanks!
Glad it helped, thanks for the comment. You will be fine with a free flowing air cleaner. 👍
What about adding a 55mm to?
Adding a 55mm to? If you are asking do you need a tune if increasing the size of the throttle body....yes, if you increase your throttle body size, or your injector size, a new tune is definitely needed.
KP
Just awesome, AWESOME, stuff from DK customs, as usual. Thank you guys sooooo much for the information you make available to us Harley riders!
I just traded in my iron 883 for a left over 2021 Low Rider S with the 114 M8 and I pulled my awesome DK customs 587 breather and my catch can setup off the iron before they picked it up. I was going to install the catch can but figured the breather would be useless without a tune, so thanks again for the information.
Thank you for the comment. Much appreciated, and glad you are finding the videos useful. Very happy to hear you are enjoying the parts.
Enjoy your new ride!👍
What’s your opinion on doing both slip ons and a free flowing air cleaner, most will always do both not just a air cleaner??
No tune needed when adding a Stage I Air Cleaner and/or Open Exhaust.
💥💥 SEE VIDEO on the 2021 M8's Here- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
So let me get this straight. For just an air cleaner i don't need a tune. But if I got slip on exhaust and a air cleaner i do?
If you have a 17-21 M8 you can add free flowing intake and slip on exhaust without doing a tune. The M8's are not like the Twin Cams and are not too lean.
Will it run a little better with a tune? Yes.
Will it cause any damage with the oem tune? No.
Here is a video you may find interesting- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
I have a 2024. TriGlide Ultra. 114ci.
So I can safely assume that I can install a Arlen Ness stage. 1 back plate with a OEM Air filter that it will not be too lean??
Yes you can install a Free Flowing Exhaust and Air Cleaner without retuning your 2024 TriGlide!
Here is another video on the subject - th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
Devin and Kevin just recently took bikes to the dyno and are making another video with the new models that shows the tune is still good in the 2024 models.
Thank you for commenting! MB
What about a softail with s slip on ? Which removes the catalytic converter but keeps the stock intake? Especially on the low rider s and low rider st?
The OEM tune is not too lean on those bikes, even the ones with a cat in the muffler.
@@DKCustomProducts to clarify, installing a slip on exhaust without a catalytic converter such as a Tab performance(which also removes the catalytic converter) on the low rider s and ST(all softail models) will not not need to be tuned and will run just fine without on the oem map, Correct? There is a lot of misinformation out there and spreading like wildfire on Facebook groups etc, reason for asking this. Thanks again for the information.
@@Mrproper86 Changing the slip-on mufflers from stock, on a M8 Softail, to free flowing with no cat, like the Tab Perf. does NOT need a different tune. The OEM tune will be fine. I am going to put a report link and a video link below showing that a tune is not needed.
Your question about will it run fine...You will lose some low and mid range torque...NOT because of the tune, but because those slip-ons will allow for more reversion, which robs power. I will put a link below "reversion video" explaining why these type of slip-ons will result in a power drop, unless you use Thunder Torque Inserts™ in them. BUT, to be Clear, the OEM tune will Not be too lean and does not need to be changed for the bike to run safely.
Written Report Link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Video of how the ECM adjusts- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
Reversion Video- th-cam.com/video/pr6z00gL5Yg/w-d-xo.html
TTI Video- th-cam.com/video/b2mN7lZ1CLw/w-d-xo.html
@@DKCustomProducts thank you for the answer and I’m checking out the link!!!
@@Mrproper86 You're welcome, man. Thanks for watching!
M8 is never too lean. But a Stage1 after a Dyna tune is runnen better. The AFR improves the drivability
Yes, it is not too lean from the factory, but with a good tune you will certainly have more performance! Thanks for commenting! MB
Great video and lots of information! But was wondering, I have s&s slash cuts with removable baffles. Would removing the baffles require a tune?
No! Just removing the baffles would not require a tune! Thanks for watching!
I added air cleaner. Harley brand. Tourque insert. No tune. Runs great. 2019 FLHT. No problem of any kind. Definitely can tell the difference. Your right, everyone else is wrong. Also use DK oil filter, wire screen. Also 1.5 tank lift.
Good to hear. Appreciate the business. Check out the following links on how to get even more out of your existing air cleaner- www.dkcustomproducts.com/overview-of-external-breather-systems-ebs.htm and a video version of the report here - th-cam.com/video/HChkevbh1Xs/w-d-xo.html
So to be clear...with my k&n filter upgrade with slip on exhaust.....il be ok without a tune?
Should I get I power tune?
If you have a Milwaukee-8, yes, you can add free flowing exhaust and air cleaner and run the stock tune with no issue.
Will it run better with a Power Vision tune? Yes! But it is not dangerously lean (like Twin Cams or Sportsters) with the OEM tune.
You may find this video interesting/useful- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
KP
Did you guys do a video on about the afr, with the stock exhaust vs slip on's?
With Slip-ons the AFR stays the same. The M8 ECM does a good job of adjusting to them. The Twin Cams are an entirely different story.
Here is a video you may find useful- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
And here is a video on a 21- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
We also had a 22 on a Dyno just a month or so ago. Put a High Flow Air Cleaner, catless header, and slip-ons on it and it was good at OEM tune. Have not done a video on it yet.
All the M8's will run a little better with a great tune, but none of them are in the dangerous lean area with free flowing A/C and/or exhaust.
Here's a link to a Report, with charts, that you may find interesting-
www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Gentlemen how’s it going- a total newbie and new to the bike world over here. Basically you don’t need a tuner if you change a full exhaust let’s say to a 2 in 1?
Welcome to the World of Harley's! That is correct, no need for a tuner on M8's from 2017-2020. Will it run better with an improved tune? Yes. Is it needed to protect the engine. No.
In 2021 HD changed the ECM and we have not yet done any testing on the 2021's to see if they also changed the AFR and/or how the ECM adjusts for different circumstances.
@@DKCustomProducts thank you very much!
Thanks. I am looking at a 2019 road glide with high flow air cleaner but no pipes or retune. I was worried it was run lean for 10k miles but sounds like it is just fine… correct? I plan to add slip ons and get it tuned if I get it to optimize everything
Yes, your 2019 Road Glide is not too lean from the factory and you can change to a free flowing Exhaust and or free flowing Intake and still not have to have a tune. Of course for optimum performance you will want a tune, but it is necessary.
You can see a written report at this link that you may find useful/interesting - www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Thank you for commenting! MB
The tech at Harley got mad when I asked him about this. I have new slip ons and an air cleaner without the tune. Bike runs great
Yeah, techs are not mechanics. As a rule they are parts replacers that do what the computer tells them to, without really understanding why they are doing what they do.
If you find one that understands the actual why and how...and does not just parrot what someone, or something, told them...that's who you might want to let touch your bike.
@@DKCustomProducts well I may have spoken too soon. My bike started idling really high after putting in the Elite heavy breather. The diagnostic code told me it’s the ECM that needs to be adjusted. Do I need a tuner for that?
@@MadCapDarkglobe I have never installed an elite heavy breather. We have dyno tested various heavy breathers. Never got a code. What year M8 do you have? What code did you get?
@@DKCustomProducts I have a RG 2020. I have the slip on TAB mufflers and the Screaming Eagle Elite heavy breather now. The code is P0505
@@MadCapDarkglobe That is a idle instability code. With codes for loss of idle control you need to find the source of the issue. By far the most common cause of idle issues on the M8 is either an intake leak with the plastic manifold or when the air cleaner was installed the throttle body support bracket was not removed. It can also be that during the install one of the throttle body sensor connections was bumped and is not getting a good connection now.
Whenever I have an air cleaner off I unplug all the connectors, apply a bit of dielectric grease, then plug them back in and make sure they are seated well.
A high idle with a P0505 code is generally not a symptom of a bad tune, but more likely a vacuum leak somewhere...so check hoses also.
Would the factory warranty require the screaming eagle tune with s e intake and exhaust
Some SE products will void parts of the warranty, no matter who installs them.
However, if you use EPA approved SE parts and install them correctly yourself, it will NOT void the factory warranty.
I would recommend getting a real warranty (you can see video on that here- th-cam.com/video/Hqkxag-S1a8/w-d-xo.html )
That way you can do what you want to your bike, and everything is covered.
One of the reasons why is that SE Stage I parts are not going to significantly improve performance or longevity of your engine. Here is a video on that subject- th-cam.com/video/GK5x3lcQvJU/w-d-xo.html
Always feel free to email or call:
Support@DKCustomProducts.com
662-252-8828
Greatly appreciate your channel and this information
Thank you for the comment, glad you are finding the videos useful. 👍😎👍
What runs hotter light to light on a 90° day . The m8 or a cone shovel ?
We have done no testing on any shovels, so we cannot say.
How about if i put an sns kit camplate cam oil pump and the rest with a 475 cam how about the tune then???
Yes, you will absolutely need to change the tune. The best way is via a Power Vision that you can see at this link- www.dkcustomproducts.com/dynojet-power-vision-flash-tuner-w-auto-tune-dk-pv-cmp-pkg.htm
And here is a good video to watch on the subject- th-cam.com/video/isBHK-Jy7Wk/w-d-xo.html
Love the videos. What if you add some slip-ons(Vance and Hines) and a high flow air cleaner, with an external breather. Would you need a tune then?
You will not need to do a tune on an M8 after doing those mods.
Will it run a bit stronger if you do? Yes.
HOWEVER, you will not be too lean (like on a Twin Cam or Sportster) if you do those mods with the OEM tuen.
th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
I just bought my 114 fat boy it came with cobra exhaust and I’m not sure what brand air cleaner! I don’t like how quiet it is! Would I need a tune if I removed baffles from the cobras? Or do you recommend I get a tune? Tia
If you remove the baffles from your M8 Fat Boy 114 you will not need a tune, but you will lose some low-midrange torque. You can install the TTI's to get back and even improve your low-mid range torque. You can see the TTI's at this link - www.dkcustomproducts.com/thunder-torque-inserts-c57.htm
Of course for the most performance out of your bike you could get a tune, but it is not necessary and it won't hurt your bike to not have a tune.
Here is a written report on M8's that you may find useful - www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Here is a written report on Exhaust that you may also find interesting - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Please feel free to contact us with any questions;
Support@DKCustomProducts.com
662-252-8828
Thank you for commenting! 😎MB
I tried my best to look through the comments and find my answer but couldn't find it. I see all these comments asking if both a slip-on and air cleaner will work, but did not see if a full exhaust and a/c will work without a tune (for example a D&D 2-1 exhaust or a full sac head and a pair of slip-on)?
Thanks for watching our videos, and for the question.
Yes, they will work with a 2017-2020 M8, we do not yet know about a 2021.
Will it run better with a tuner? Yes.
Do you need a tuner to prevent damage being done to the engine. NO.
So if I have cobra pipes I can put on a high flow intake and NOT have to tune it then? It’s a 2020 FXST
That is correct. See this video- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
And this written report- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
As you will see from the dyno charts in the link above, it will run a little bit better with a good tune, but is not necessary for it to have a tune to protect the engine. It will not be too lean like the EFI Twin Cams and Sportys.
Does adding the high flow Air intake void HD warranties when adding it to my bike?
Bike is a 2022 with kromewerks slip ons..
Any of our Outlaw HiFlow Air Intakes do Not void the HD Warranty on your 2022 bike.
Below are two videos you may find useful/interesting. Also, here is a link to the Intakes that will not void the warranty.
www.dkcustomproducts.com/air-cleaner-intake-c10.htm
th-cam.com/video/M-QdwkZ3_RQ/w-d-xo.html
th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
What about the breather tube
It is always best to run and External Breather System. Check out this video- th-cam.com/video/EfDeFZblMck/w-d-xo.html
18 Roadglide. STAGE 4 KIT .SCREAMING Eagle Tuner..I took the Catalytic Converter OUT.Do I need to Dyno Or Retune it ???
I have a 2022 Heritage 114.So I can change to a high flow air cleaner and Bassani 2 into 1 and the stock ECM will take care of it?What about decel pop on this set up? Thanks for the videos, great info
We have not tested the AFR on the 2022's, so we cannot say. We did test the 2021 and it is good. You can see that video here- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
Many folks say the 2022 is the same, but until we test it, we cannot say for sure.
Decel pop varies, bike to bike, and set up to set up.
Here is a video on decel pop, with some things you can do to get rid of it if you don't like it- th-cam.com/video/I_djBYYYu28/w-d-xo.html
Here is a video on the ECM that you may find interesting/useful- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
Good stuff !! Just got the new Softail StreetBob with 114 M8.. I added S&S Slashcut Slipons for some sound.. I figured the ECM would accommodate the muff change, but your video adds a layer of comfort..
Congrats on your new ride! 👍 Glad you're liking the vids.
I purchased my Street Bob 114 four weeks ago too. I have an appointment in 2 weeks for the Stage 1 SE exhaust and tuner. Should I cancel I'm wondering. Going to cost 1600 up here in Canada. Do you think the dealer would detect if I just put my own exhaust on it and cancel the Stage 1. I have no problem taking off a after market exhaust before I take it in for service. Just don't want to lose my 5 yr warranty. I know these would definitely check the ecu for sure. ..they are a##holes like that.
@@tricgix2949 Yeah, the ECU is supposed to be checked at every Harley Dealership whenever a bike goes in.
I can only tell you what is best for your bike, and what I would do.
I would run whatever exhaust I wanted, that performed well, along with an air cleaner that was free flowing and did not put hot, oily, oxygen depleted air back into the intake and combustion chambers.
Then, IF, I ever had to take it in for warranty work I would put the stock air cleaner and mufflers back on.
There is not going to be a very big gain at all from the SE exhaust and tuner, not worth the $ to me.
Here is a video you may find useful- th-cam.com/video/GK5x3lcQvJU/w-d-xo.html
@@tricgix2949 The bike had enough HP and Torque for me, I just wanted a bit of sound.. Put the S&S Slashcut Slipons with DB Killers removed. They arent obnoxious at al.. Just enough sound for me. Now about issues with warranty. My dealer doesnt have a concern with slip-ons. The ECM doesnt recognize that. It does recognize a tuner. It depends what your needs are.. For me, $330 mufflers was all I wanted.. Its plenty quick enough for my riding style.. My 03 Dyna with Stage 2 upgrades is my play bike. But the Streetbob is about as quick or ?
So I'm running a 17 m8 107 with open pipe..and I need no tune? Right?..but what if I also do air cleaner too?
No, you do not need a tune for your 17 M8 if you change to a free flowing exhaust and Hiflow Air Cleaner.
Here is a link to a written report on the subject that you may find helpful- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Thanks for commenting! 😎 MB
Hi there thanks for the great videos ! Im about to install no CAT dual headers with straight through fishtails but still using oem air filter & intake on my 2017 road king m8 , do you think my bike will show some lights after & need tuning ? Or not ? Many thanks
As long as you install your OEM O2 sensors in your new exhaust, you are good to go. No lights, no tuning needed.
Glad you are enjoying the videos. 👍😎👍
If you put some Thunder Torque Inserts in your new exhaust, I think you will be well pleased with the Performance Gain. Here is a link to some info on them- www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
I have a '17 UL with slip-ons thinking about decating the stock header and adding a high-flow air filter. Is it still good without a tuner?
You do not need a tune for your M8. The M8's do run great from the factory, and still run great after upgrading to a free flowing exhaust and HiFlow Air Cleaner. Getting an after market tune would maximize the performance, but is not necessary.
You can see a more another video on this subject at this link - th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
You can also see a written report we've done at this link - www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
You can see more about exhaust at this link - www.dkcustomproducts.com/harley-exhaust-myths-and-facts.htm
Thank you for commenting! MB
I have a 2018 fxbb softail Streetbob I just bought this bike a little while ago and it came with a tbr pipe on it . I was wondering if I out an aircleaner on it I still don’t need to get a tune the stock tune is acceptable ?
That is correct! On your 2018 Streetbob your AFR is not too lean from the factory and you can upgrade to a free flowing Exhaust and Air Cleaner without having to re-tune. Of course if you re-tune you will get more performance, but it is not going to hurt your bike to make those changes and keep the OEM tune.
Thank you for commenting! 😎MB
On a factory stock 17 Heritage.
Can you change the AFR?
Yes, you can change the AFR if you have one of the tuners at the links below. It will run a bit stronger, factory stock. See charts at this link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Tuner links-
www.dkcustomproducts.com/dynojet-power-vision-flash-tuner-w-auto-tune-dk-pv-cmp-pkg.htm
www.dkcustomproducts.com/v-h-fuelpak-fp3-efi-flash-tuner-w-auto-tune-for-stage-i-ii-s-dk-vh-fp3.htm
So I have a 2020 Street Glide Special...I do NOT a tuner if I’m just doing doing slip on and air cleaner???
That is correct. Will it run better if you do a tune? Yes. Will you damage it from running the factory tune with those components. Nope...it is not too lean like the Twin Cams.
What if you run a header with this same setup? Wanna get rid of cat to eliminate heat ?
@@jesselegz4312 It is fine with a header and no cat. No need to tune. Will it run better with a tune? Yep. But it will not damage it using the factory tune.
I know this is a recurring question, but the dealerships and some indy shops, getting conflicting info. I have a 2020 107 street glide. I have a harley st air cleaner, decanted stock head pipe and s&s grand national slip ons and no tuner. I was told this would destroy my engine, but from what I read on here I should be good??? Please help
Yes, there is a lot of confusing info out there. This is something we have researched and tested extensively.
M8's from 2017 thru 2023 are NOT too lean, whether in OEM condition, Or with free flowing intake and exhaust. Here is another video on the subject, and below that link there is a report showing that the AFR's are in the safe range, even with free flowing intake and exhaust.
th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
HOWEVER, they do run too hot for their own good (but this is NOT because of the tune). Here is a video on low and no cost ways to cool it down- th-cam.com/video/o3T3yA9BKwE/w-d-xo.html
Here is a written report with lots of info on why and how to cool your Harley down- www.dkcustomproducts.com/why-how-to-cool-down-the-twin-cam-engine-part-i-dk-cl-tc-dn-1.htm
And Here is a video of something your Harley will love for you to do for it- th-cam.com/video/EfDeFZblMck/w-d-xo.html
Im having to change my tune to make it more rich. Ive done a LOT of changes chasing the heat problem on my 2020 RG. even stock it was HOT. after doing a stage one complete it helped a LITTLE bit. no cat headers, free flowing for the most part. but engine temp is in the 330s on the interstate. this is about 70 degrees higher than they say it should run. mechanic said mostly likely increasing the fuel just even a bit could drop it 30-40 degrees. which at least makes it ridable even if only 30 degrees are dropped. Im having to put my foot on the right side peg any time I am not actively using the break cause it'll literally blister my ankle through my boot.
I know exactly what you are talking about. 10's of thousands have experienced the same thing, including myself.
We have made an entire video series on the subject. We also have a written report on the subject. Links to both are below.
th-cam.com/play/PLb3bvZgbH92_3s-2vv63QggFJ3nteFd_C.html
www.dkcustomproducts.com/why-how-to-cool-down-the-twin-cam-engine-part-i-dk-cl-tc-dn-1.htm
btw, going from the OEM tune on your M8 to a good tune will drop temps 10-15 degrees. Not sure if you can get a 30-40 degree drop going from the OEM tune to a different one...it is possible to get more than 15 with a tune that is super rich (richer than it should be).
Check out the links above to see how to cool it down and have it run right!
I love the PABST BLUE RIBBON BEER HAT DUDE, ROCK ON 🤘👍🤘👍
Will pass on your comment to Dwayne. Ride Free!
Do you need to have it tunned if you add the air cleaner and also remove the cat.
You do not. The M8's are not lean from the factory like the Twin Cams and Sportsters.
You can add free flowing intake and free flowing exhaust and the OEM tune will Not be too lean.
Here is a written report with many charts on the subject- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
As you can see from some of the charts, it will run a little bit better with a tune, but it is not necessary.
2022 rgs I have tab 50cals. want to add trask air cleaner. Do I need to tune? Leaving cat in atm
No need for a tune now, but you will need one later. Check out this video-
th-cam.com/video/EfDeFZblMck/w-d-xo.html
Is there any tunes for new bikes like the softail standard 2023.. wanted to run a full system 2 in 1 exhaust TBR shorty turn out.. any info ??
We offer two tuners that will work with your bike. You can see those options Power Vision 3B and FP4 at this link www.dkcustomproducts.com/efi-tuners-c74.htm .
You can email our customer service at support@dkcustomproducts.com for any questions you might have about the tuners or the capabilities! Thank you for watching!
I'm looking to change my whole exhaust to a 2 into 1 to delete the catalytic converter does it make a difference?
You will pick up a little bit of power by going to a 2-1 header. You will have far much less heat radiating from the exhaust, because of the delete of the cat. You will not need a new tune to protect the engine from running too lean, however, it will run better with a tune.
Thank you so much!
Do I need to tune my 2015 sportster? I put just a slip on exhaust
All Sportys since 2007 run lean from the factory, and even in stock condition they benefit greatly from a tune....even the XL-ViED, that is linked below, will improve the lean condition AND will get rid of that little stutter/hesitation at low RPM.
www.dkcustomproducts.com/xl-vied-fuel-enrichment-harley-efi-plug-n-play-2014-up-sportster-dk-xlvied-14-nr.htm
so if i add a K&N RK-3955 Intake System-Harley Davidson, on my 2018 road glide i won't have to have a tune for it. add would i be able to use your transformer kit with it
No you would not need to change your tune for an intake upgrade...
That air cleaner will not fit with the Transformer. If you have not already ordered that Air Intake here is a very useful video to show you what will fit with the transformer at this link - th-cam.com/video/_XYXScy3j0Q/w-d-xo.html
After looking at the K&N RK-3955 it looks like you would need one of our DIY External Breather Kits seen at this link - www.dkcustomproducts.com/diy-external-breather-systems-544.htm
Please feel free to contact us with any questions you might have;
Support@DKCustomProducts.com
662-252-8828
Thank you for commenting! 😎
hate too keep asking questions but if i replace the header pipes so i have true duals and the air cleaner i still don't have to tune the bike right
That is correct, you can run free flowing intake AND exhaust with no need to tune your 2018 M8.
I have a 2017 flex can I change exhaust an do nothing else or do I have to get high flow filters
On a 2017 M8 engine you can absolutely change the exhaust without having to get a high flow intake or a tune.
If I install slip on.flhx 2017 will I get alot of popping. an run really bad
@bob levesque Good question.
You may get some decel pop, it all depends on which slip-ons, which air cleaner, how you ride, what elevation, etc. Here is a really good video on what causes decel pop- th-cam.com/video/I_djBYYYu28/w-d-xo.html
It will run with less low and mid range torque because of reversion. If you put in some Thunder Torque Inserts™ they will increase your low and mid range power to More than you have with the stock pipes. Video on that here- th-cam.com/video/b2mN7lZ1CLw/w-d-xo.html
So, I purchased a 2022 Heritage Classic 114... It comes with a High Flow Air Intake and Filter from the Factory. I'm wanting to add Cobra Neighbor Haters Mufflers... Will I need to tune my 114???
It is an OEM high flow, but it is still feeding hot, oily, oxygen depleted air into the throttle body and combustion chambers. See video link below on why that is so detrimental.
That said, the OEM tune will keep the AFR is the safe range, even with the addition of the neighbor haters. Eventually, because of the hot, oily air, it will need to be tuned to continue running well.
EBS Video- th-cam.com/video/EfDeFZblMck/w-d-xo.html
Here is another video you may find useful- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html&t
@@DKCustomProducts 10-4, I was thinking of purchasing a tuner. I appreciate your channel
@@FLHCSfan68 Glad you find the channel and videos useful, thanks for watching!
What about the factory 117 on the CVOs?
This is relevant for all M8's! Thanks for watching
Excellent video and Thank you! So, how about adding slip ons (TAB or like that) to a '21 Heritage? Needs a tune or not?
Thank you, glad you enjoyed. We have a video on the 2021 at this link- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
You can use a free flowing air cleaner and free flowing exhaust with your OEM tune. No tune is needed to keep you from being so lean that you cause damage.
It will run a little bit stronger with a good tune, but it is NOT necessary to have a good running bike or to keep it from being too lean. The OEM M8 tune is much better than the OEM tune for Twin Cams or Sportster.
Once again, a great and knowledgeable video !!! Thankx Kevin and Dwayne !!
Appreciate the comment! Glad you liked the video. 👍
What if you add a performance cam on m8. Tune required?
Absolutely.
Here's a video you may find interesting/useful- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
Will I be ok to run my 2023 lowrider s with hi flow air cleaner n 2into1 exhaust till I figure out what tuner to get? Thanks n subbed !
Yes, absolutely. The 2023's are the same as the 17-20's in that they are not too lean. Here is a video on them- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
@@DKCustomProducts thanks 🙏
@@Mike-hk6rw You're welcome, thanks for watching our videos!
Thank you for all the info its been very helpful. I have a 2021 street glide with a 107. If i add a high flow intake, delete my catalytic and and slip ons i don’t have to get a tune?
That is correct.
Glad you are finding the videos useful. 👍
Question Decatted stock header, cobra neighbor hater slip-ons stock air filter. Is SGS 2022 M8 running lean now. Does he have to tune it now.. He was told by a shop over the phone it's running lean now. Without them seeing or hearing the bike..what tuner do you suggest. Not doing cams
Unless he has a leak somewhere, he should not be running too lean. All M8's (2017-2023 - 2024's not here yet) can have free flowing intake and exhaust and run the OEM tune without being too lean.
Here is another video on the subject- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
If he still wants a tuner, we prefer the Power Vision, but many folks like the FP4 that works with a smartphone.
You can see them both at this link- www.dkcustomproducts.com/efi-tuners-c74-317.htm
How about show some maps for 114 117 131 power vision showing how it’s keeping the 12-14.5 AFR
We show the 114 in the video linked below. We have done nothing on the 117 or 131.
th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
I just bought a Power vision 4, darn!
Nothing to be upset about. The power vision is a great tuner and even though the M8's do not need a tune, a good tune will only improve your performance. Thank you for commenting! 😎 MB
Can you change both the intake, and a set of slip ons without a tune? 2021 Ultra Limited.
Yes, the OEM tune will adjust. Below are links to a written report and to a video on the subject.
th-cam.com/video/0vbTkRvFa80/w-d-xo.html
www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
@DKCustomProducts how about without the Catalytic Converter?
My wife bought me a 2022 road glide with a 107 M8. Which air filter system would you recommend and do any of yours void warranties?
Congrats on your new ride! 👍
All of the 587, 606, 636v & 828 air cleaners at the following link will fit your bike. They will all make for better performance. It is really just a matter of which one you like the looks of the best. None of them will void your warranty. (some Dealerships may say that they will, but the FTC just came down on Harley hard for saying things like that, see the video link below)
www.dkcustomproducts.com/air-cleaner-intake-c10-327.htm
th-cam.com/video/M-QdwkZ3_RQ/w-d-xo.html
Just purchased a 2023 street glide M8 107 and got the Vance and hinds big radius and a open flow k&n intake is it okay to run the bike without a tune for a while or will it mess up the motor?
You can go with a free flowing intake and exhaust and still not be too lean on your 2023 SG. Here is a video relevant to your year bike- th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
Here is another video, about how the ECM adjusts, that you may find useful/interesting- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
thanks a lot for putting this info out there guys! 👍 really goo stuff! I really wanted to see where the M8 stock tune AFR's were running, but don't have "easy access" to a dyno. this is great news for a lot of people. I'm guessing that a higher flow air cleaner and slip-ons will potentially cool it down some too?
We have charts showing where the stock AFR tunes are running, you can seem them at this link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
The higher flow air cleaner and slip-ons will cool it a bit. Make sure to run an External Breather System on the air cleaner...that will do more to cool it down than the high flow of the air cleaner. Also, stop the reversion in the slip ons, that will do more to cool it down than the free flow aspect of the slip ons. There is a whole series on why and how to cool down an M8 at this link- th-cam.com/play/PLb3bvZgbH92_3s-2vv63QggFJ3nteFd_C.html
Ok i got a 2020 breakout so you are saying i can go with a SE extreme AC and a super trapped bootlegger exhaust and do not need a tune till the next step of put a cam.
That is correct. Will it run better if you do a tune? Yes. Will you damage it from running the factory tune with those components. Nope...it is not too lean...especially with that air cleaner that is shooting hot oily air into the intake.
I have to ask, if an aftermarket air cleaner does not change the AFR.... then was the stock air cleaner flowing enough? No change? Following that, then maybe a cam, bigger cylinders would then require a better air cleaner since it would then flow higher volumes?
The aftermarket air cleaner clearly makes a big difference. The ECM adjusts the AFR to keep it in a good range, resulting in a nice bump in power.
Look at this dyno chart to see a 10% increase in HP by just changing to a good air cleaner- www.dkcustomproducts.com/media/wysiwyg/Stock_Stock_587.jpg
There are more charts and info on the subject at this link- www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
@@DKCustomProducts i wasn't aware the factory ecm was able to compensate that much. Good to know.
@@vf12497439 Yeah, the M8' start at a good AFR, and then with roughly 20% adjustment available in the ECM it does really well with up to free flowing exhaust and intake.
You may like this video, that shows HOW the ECM adjusts- th-cam.com/video/0vbTkRvFa80/w-d-xo.html