The 50s and 60s had open to atmosphere crankcase vents. The breather or catch can cleaning would tell you or show you what is expelled from the crankcase especially up north. Some people have to be heard regardless if right or wrong. My thought if you can’t fix it don’t ride it. I had a vtx bike once. It had a hidden plastic catch tube behind the air cleaner. It caught tons of sludge. But the funny part was most that had sludge issues didn’t know they had it and it was full. Another foot in mouth case. I would not waste my time responding to wanna be mechanics. I enjoy your channel and products. Keep up the good work.
Man, thank you for the kind words, and we appreciate your business. Good to hear you're liking the parts. Interesting set up on the VTX. Thanks for that. 👍
What is your thoughts on the trask trans top cover with the breather in it for the m8 I have a 20 softail standard and already have one of your intakes and external breather systems I wasn't sure if adding would be good or unnecessary ?
@@donreynolds6447 Thank you for your comment, and we appreciate your business. Yes, in the last year there has been a lot of talk about this subject. I have seen NO data, No testing, thus No results supporting the thought that an additional breather is needed. It does make sense (not tested or proven) that if a bike has a problem with sumping that venting the crank would be a band-aid that might help...Until the problem that is causing the sumping is addressed. I personally would fix whatever was causing the sumping. If you have no sumping issues, then it is completely un-needed. You already are venting the crank pressure via your External Breather System.
Not only you guys don’t make much money on EBS but you guys show so well how to instal it that I got to create my own EBS system from scratch using 1-2 of your video ! We, Harley riders, appreciate you
Installed the 606 with the catch can today, on my 22 triglide. Easy installation took about 30 minutes give or take 5. Noticeable difference on test ride after, definitely worth the investment.
Thanks for sharing, glad to hear you are enjoying the benefits of the parts! We appreciate your business, and wish you many miles of smiles on your new TG! 👍
Doc Harley recently did a video on the advantage of an external breather. I put your system on my 19 and instantly you could feel the difference. It’s like the bike woke up!
Thank you, we appreciate your business. Yes, it can make quite a difference to put only cool, clean, oxygen rich air into the combustion chambers. That hot, oily, oxygen depleted air just takes up space in the intake charge, robbing the bike of power.
After watching many of your videos, I ordered a catch can kit for the Gen 2 M8. This is for my 2024 RG. It has some 2.7K miles now. Will be installing it this Friday when it arrives.
Best thing I’ve ever done for my bike! Had lots of blow by in my filter but even after 1k miles my filter is completely dry! I also did the primary vent and solved the sumping problem. What would we do without you guys on You Tube! Saved lots of bucks doing these fixes from your help. MUCH APPRECIATED!
Greetings from downunder I just installed a external breather on my 2014 Fatboy lo,of my own design,I used a brake fluid reservoir as the catch can after traveling 800 km I was amazed how much gunk was in it which would have ended up.inside the engine.
I installed your EBS with catchcan and 606 air cleaner kit on my 2018 street glide special. I got great throttle response and could feel that little extra power from the nonrestrictive air cleaner. What I found in the catchcan was disgusting and wish I had purchased this sooner. While talking to my local mechanic before I went on a 600 mile trip he told me to take the EBS system off because it was actually beneficial to let that crap run back into your throttlebody and that there was vacuum coming from those tubes. According to him if I had hit the interstate on my 600 mile trip I’m more than likely would’ve blown my engine. I have a complete stage one on the bike now along with a Feuling Vented dipstick. He said to keep the dipstick but take the EBS off. I did take the EBS off because I’ll be honest this mechanic is well known and does great work and he’s constantly tearing down M8 motors because they’re blowing up. I do believe in your product and I am gonna reinstall the EBS system when I get my new gaskets . I do believe I have a issue because before I went on my trip I changed my transmission and primary fluids, I had 40 ounces in my primary and 26 ounces in my transmission. I believe there’s only supposed to be roughly five or take 30 ounces in the primary so I don’t know where the other 10 came from. When I got back from my trip my oil level had fallen down to the bottom dimple of the side stand check while it was cold where it’s normally in the middle. My bikes been running good but I do have something going on with fluids transferring
Wow, a lot to unpack in your message. Let's do the easiest first. 1. It sounds like you are having a transfer of fluid from the transmission to the primary. This was common until late 2019. Then Harley started putting a vent, as OEM, in the primary to stop that transfer. Here is a video on that subject- th-cam.com/video/B_EhFFKvHEM/w-d-xo.html 2. I do not want to offend, but I also want to be honest with you. Between your mechanic not knowing/telling you about the primary transfer, and then their advice on the EBS, I recommend re-evaluating your opinion. 3. Your year M8 is in the 2017-2019 period when HD had problems with sumping (which can lead to the engine "blowing up"). Someone should check that out on your bike and fix it, if it needs fixing, BEFORE it "blows up". The vented dipstick is just a band-aid for bikes that are borderline having a sumping issue. 4. I don't even know what to think about a mechanic that would say that an EBS could lead to an engine blowing up. I do know that if any mechanic ever seriously said that, I would never let them near my bike. There is no significant vacuum at the throttle body end of those tubes...the vacuum in the throttle body is going to take the path of least resistance, and that is thru the air filter. Any vacuum present at the end of the tubes is NOT going to make it to the crankcase...it has to go thru the umbrella valves (which are one way...relieving pressure from the crankcase) and then thru the rocker box, and then thru the pushrod tubes, and then thru the crankshaft. It just does not happen, even if the one way umbrella valves are defective/worn out/malfunctioning. Sounds like you already got that part figure out. Wishing you many miles of smiles!
I have your breather bolts on my 08 fatbob and totally happy. At first I'd get a little, and I mean little, bit of spray from it but I added the 2nd piece of foam filter and it's been great ever since.
Some engine builders say it is unnecessary if you run a vented dipstick or vented transmission cover... all I know is that my bike runs better. I also run the vented transmission cover. Keeping the snot out of combustion chamber makes perfect sense. Venting the transmission cover also helps with blowby that many owners experience, which results in excessive oil consumption. Keep these videos rolling. I enjoy them :-)
Thanks man. Glad you are finding the videos useful/interesting. Yeah, theories abound, what we go off of is what actually works in the real world. Street Developed, Street Tested & Dyno Proven.
@@DKCustomProducts I have watched most of your videos and have learned from them... I also enjoy them. we don't always see eye to eye, but that is okay and healthy. keep up the good work : - )
I installed you're external breathers with a catchcan on my 95 sportster. Hands join the best thing I've done. I actually had to re-tune the carb and have been saving a little money for fuel! The only things I changed are the parts that connect the breather bolts to the hose and the t fitting. I switched over to a nicer quality set of chromed, billet metal ones I had made, and a brass t fitting to go with the theme of the bike. Besides that, 100% worth it, even got a little power boost and some fuel economy out of it.
I've got your system and it freaking works. Just put on your newest catch can and did get a little oil spray on my exhaust but I'm pretty sure it was because we were on a 1000 mile Ironbutt and I've got my can just below the air cleaner.
Thanks man! Appreciate it. Yes, give the oil level a check. Don't like to see any spray coming out...but better a little on the pipes than a lot in the cylinders.
Great vid response guys, now I will tell you my story: My baby is a FLSB 2019 Sport Glide and after watching your info on external breather system purchased it and installed it. I already had a stage 1 kit and had just had HD install a SE stage 2 kit. Now I know what my bike does performance wise as I run in the stage 1 kit a Vance & Hines FP3 and MPG/KPL (I live in Australia) and it was within spec to originals. Just prior to the install of the stage 2 kit I installed your system and it was noticed by the HD mechanics who commented (all three) they know why its done and agree with why as its all to do with certain regs. I was also about to embark on a 6900 kilometer ride from Victoria to Far North Queensland (there and back in 9 days) doing 800k's a day on the way up sitting on 120k's cruise until the tank ran dry then fill up and go again. The bike never missed a beat and I can attest MPG/KML increased by more than 10% and I ran like a dream. On return from the trip the bike was dynoed as it could not be done before I had to take the trip and the mechanics at HD stated how well the bike was running and on inspection of your system noticed how clean it was and were very impressed to the point will recommend it to anyone you asks the question on burning exhaust gases in an M8 motor or any than can take your system without an external can. Bit long winded enjoy your vids love your products (shame its hard to get them hear in OZ) keep up the great work.
I'm running your breather bolts on my '20 Road Glide Special, so I get to smell the vapor that would have been going into my motor. I'm so glad that isn't going into the motor anymore!
I got these breather bolts on my 12 Road King as well, emailed DK and asked if they sold the replacements for the little circular filter, screens and snap rings. Well, I found the little snap rings at Ace Hardware and a guy at DK, I think his name was Dewayne emailed me back they don't sell the replacements but he gave me good info on getting the filter material and screens from Amazon. thx guys.
I recently saw a video where Kevin Baxter of Pro Twin Performance was tearing down an M8 engine that had 80k miles on it. He said the owner took pristine care of the bike. But I noticed he didn't vent his EXTERNAL BREATHERS exhaust. The owner said there was noise coming from the engine so he took the bike in. Everything was OK until Kevin Baxter got everything torn down to the piston arms. The front one had slop in it at the flywheel. My first thought was WOW! I wonder if Kevin and Dwayne saw this before. The pistons were probably slightly out of balance due to excessive carbon build up and over time this possibly caused the slop in the front piston arm. I saw the piston heads in the video and they looked 'caked up' with thick carbon deposits. I imagine at high speeds this could cause some wear after a while (thanks to our friends at the EPA).
Harley's of today are quite complicated with all of the EPA restrictions, EFI, and high tech components. Luckily there are still simple ways to improve performance and cooling, like these common sense approaches you guys have taken. I ordered your External Breather Kit and watched the DIY install video. Installation was easy and quick. Good work guys!
My humble opinion; a big part of the problem is that people running their M8 at too low of an RPM. Your sweet spot is 3,000 RPM. So try and keep your RPM between 2,800 and 3,200. Of course venting crankcase oil back into your combustion chamber compounds the problem.
My bikes a 19 eg standard. I didn't really worry about it till I changed out the plastic pos manifold while doing the cam. I vented it to the atmosphere immediately after seeing all that crap in there.
Yeah, lots of folks think the photos we have of all the crap inside their engines are somehow an exception...it is amazing what gets in there and gums up the works. Good to hear you've got it taken care of on your ride. 👍
Finally got around to cobbling my own external breather together. Pretty interesting to watch the IAC drop whenever you crack the throttle on my Powervision. The IAC temp is still hotter than I had hoped but I guess that depends on exactly where exactly the sensor is. Wish I had done it sooner!😬
Yeah I did this on my stock air box on a 2012 Road Glide years ago and I couldn't believe the power boost it was like I did a stage 1 . It also helps in cooling the motor down.
Dk. I'm writing from Italy, At the end of 2019 I bought a 2006 Fatboy 88 One of the first thing I did, made a catchcan And reroute the system Best thing I did. By chance couple months ago I stumbled on your site , excellent Info. My first bike was a 1946 knucklehead Way back1969. Keep up the good work Arrivederci 👍
Greetings! Glad you are liking the videos! Good to hear you are keeping your bike clean and running well. A knuck... very cool. Sounds like you have enjoyed your rides! 🙂
@@DKCustomProducts Yes have many many good memories of the old days!!! For example late 60s early 70s me and an other scooter tramp bought a 1956 Police special everything on it except siren and Buble Running $75.00 . You remember stompin 76 Galax Virginia? Comment on the external breather After about 2500 Miles I drained the can Got Les than a tea spoon of oil mostly condensation, Drained it again 5000mls This time no cond. Hardly any oil How do you explain that. Thanks for your time.
@@lucianopasqualucci126 Very cool, those were the days. In 76 was when I rode my first Sporty...out in California. Did not know about the festival at the time. Sounds like a great time. Those were the days for sure. Sounds like you have a bike that does not spit much. First 2500 miles were either in colder weather or shorter runs, or both. Thus the condensation. Next 5000 miles probably hotter weather or longer runs, or both. Sounds like you do not have much of a spitter. There are pretty big variances on how much oil gets spit...but they all have hot, oxygen depleted air...and keeping that out of your intake is always a good thing for performance.
@@DKCustomProducts i appreciate your reply, Looking back you are absolutely right on your comment"cold weather and short runs,hot weather longer runs. I will pay more attention on that. On the small quantity of oil spitting, that's a good sign low blow-by. Thank you again for your time.💪👍
Good video. What I think a lot do not understand is there will be a bit of oil getting past the rings and valve guides, why would anyone want to have the head breathers being put anywhere near a vacuum source to help suck that oily moisture into your engine. Keep up the knowledge, it always equal power, Nuff Said
One thing i noticed is some harley owners (its new to me this year) is having things so back assward when it come to allot of issues. External breather causes sumping on a carbed bike???(mines carbed 2000fxdwg) unless you have somehow obstructed your vents. Thats not why someone developed sumping if properly done. Mine was easy to vent externally because it was equipped with the old cv carb se filter kit. Its a new to me bike that had domed high comp pistons, had allot of pre ignition issues/and hot starting was brutal, at 220psi ccp no wonder. I have 1000 miles on new flat top pistons, that gave me 185ccp, about 10.2:1 now. Way better! We will see about the carbon buildup running an external breather. Im also interested in that coil relocate of your guys. But i want to rig up a temp sensor on my carbed bike to verify the claimed temp reduction my😁
I’ve run external breathers in all my evo bikes and I agree with y’all I finally found your kit for my 08 heritage and your e-mail says I’ll receive your kit Monday can’t wait to put it on ,,,,,,, by the way I see Arlen ness has a filter kit my question is what good is his if it doesn’t vent out side the intake
You mean Dwayne doesn't ride WOT?, all of the time?. I bet y'all sit around the table ( even at The Dinner 🔔) , and shake your heads with laughter, from some of the comments. Thanks guys for providing us with videos of knowledge, and laughter. ✌
Based on your cfm results, looking at the cfm being 'breathed' out (I'm going by the data on your website), is it really worth it to add an external breather to a stock EFI Sportster? Your data for the Sportster was that the cfm 'breathed out' was very small. Thanks for your good work and efforts.
It is true, the typical Sporty will not push as much hot, oily, oxygen depleted air into the combustion chambers as a Twin Cam. But a Sporty is still pushing that crap into the engine, and it is just a matter of time before there is enough build up that the tune will no longer match the increased compression. ALSO, IMMEDIATELY there is a gain in power from only clean air going into the intake after an EBS is installed on a Sporty. Here are a couple of links of dyno runs on Sportsy, with and without an EBS. www.dkcustomproducts.com/media/wysiwyg/DynoComp_1.jpg www.dkcustomproducts.com/media/wysiwyg/breathertest_1.jpg Here is a link to more info on the benefits of an EBS. www.dkcustomproducts.com/overview-of-external-breather-systems-ebs.htm Every individual has to decide for themselves if it is worth it. I would never run any engine I cared about without an EBS.
I’m new to Harley’s what is your advice on a 107 m8 as far as build up of carbon, I had cobra slip ins fitted but haven’t done anything about changing to filter yet, the bike is brand new but I have put 2500 miles on it
Stop building it up, and what has already built up will burn off. Here is a video you may find interesting/useful- th-cam.com/video/EfDeFZblMck/w-d-xo.html
I'm running a DK Customs external breather system (EBS) and I noticed that after a few months, my hoses that came with the kit start cracking. I just chuck it up to wear and tear because of how close it is to the engine and exhaust. How often does everyone else have to change out their rubber hoses for their EBS? ***By no means am I knocking the product. I'm very satisfied with my EBS***
Hose should not be cracking. I have had EBS hose on a variety of bikes for many years, and 10's of thousands of miles, with no visible degradation. I suspect that the engine is running very hot, and/or the hose is very close to it. Another possibility is that there may be some cleaner that you are using that is not rubber friendly. If you are in the USA, give an email or a call to the contact info below- Support@DKCustomProducts.com 662-252-8828 Let them know that Kevin said we would send you another length of hose for your EBS at no charge. If you are outside the USA, check and see if your local auto parts store has the hose you need, then let us know what you spent to get it...should be less than $7, and we will take care of that for you. Route it with at least 1 inch between the hose and the engine, and at least 2 inches between the hose and the exhaust. Thank you for your business, and for letting us know. 👍
Dunno what bike you have, but here are some good choices on Air Cleaners that already have an External Breather System. www.dkcustomproducts.com/air-cleaner-intake-c10.htm
Yes, you can see options at the following link. You can also email or call and discuss your options, get any questions answered... Support@DKCustomProducts.com 662-252-8828 www.dkcustomproducts.com/diy-external-breather-systems-466.htm
Every External Breather System we have is a crankcase vent. The Systems we have prevent 100% of the hot, oily, oxygen depleted air from going into the throttle body and combustion chambers. This extends the life of the engine, gives more power, runs cooler, and prevents tune instability. You are probably asking about the vents that have become the fad in the last year that vent at the actual oil tank. With these there is still some hot, oily, oxygen depleted air being fed into the intake & they cost more. It is spending more and getting less benefit.
Yes, you can see them at this link- www.dkcustomproducts.com/softail-tank-lift-kits-c30-56.htm And here is a little video on them- th-cam.com/video/KokKdOdDM6E/w-d-xo.html
I have these breather systems on both my 12 and 13 RKCs and my 18 Ultra LTD. The only real argument against this that I question is the loss of vacuum by routing to a catch can. Is this a concern?
It is not. The recently circulating theory of needing vacuum from the intake for better ring seal is just that, a theory. No tests or evidence has been posted showing that to be true. The holes in the tubes in the intake (and subsequent passageways back to the crank case) are so small that the vacuum created in the intake takes the path of least resistance, pulling in thru the filter element, not the breather tubes. btw, I've seen a couple of videos of folks trying to measure that phantom vacuum thru the venting system. They were both honest in disclosing that they could not get any measurable reading
@@DKCustomProducts - Thanks. I kind of thought this may have been a ghost chase as well. Especially considering if any significant vacuum existed, we wouldn't find oil gathering on our intakes and dripping off our air cleaners without breather set ups. It would get sucked into the intake when open and it doesn't (not anywhere near all of it anyway). I have these on all 3 of my current bikes and I think they are great. Thanks!
Yes, whether an engine is EFI or carbed, it is not good to have hot, oily, oxygen depleted air going into the combustion chambers. Your carbed Sporty will run better and longer with an External Breather System. Here is a vid you may find interesting- th-cam.com/video/EfDeFZblMck/w-d-xo.html
None of our bikes have carbon buildup to take off. 😀 If we do run into a bike that has some buildup and we have it apart, we will do that. Thanks for the idea.
If you are puking a lot of oil, it may overwhelm the filter and drip some, so a catch-can would be more beneficial to stop that. As far as performance improvement, the engine does not car if it is a filter or catch-can, all it cares about is that there is no longer hot, oily, oxygen depleted air going into the combustion chambers...so for functionality, they are equal.
Do I need to clean or replace the little mesh with the cottons on the external breathers? haven't done nothing to them since i got them from you guys. been yearrsssss!
It is not 100% necessary, but does not hurt. Sometimes I go quite a few miles without cleaning them...Once, well over 20K. Below is a video on how to go about it. However, it does not change the efficacy of how they work...just if they will dribble a bit or not. th-cam.com/video/W_8oCbO2yc0/w-d-xo.html
It does not change the AFR. No need for a retune. The oil mist is relocated to the catch can instead of the combustion chamber. No more coke in the chamber.
The change in the AFR is small and the ECM will adjust for it. Here is a video on the ECM that you may find interesting- th-cam.com/video/0vbTkRvFa80/w-d-xo.html And here is a video we made answering the question of if you need to tune the bike when venting externally- th-cam.com/video/2BpGbBnfMkY/w-d-xo.html
@@DKCustomProducts for those who have not yet committed to this setup... the minute I installed the external breathers on my stock 114 engine, it revved quicker and higher in between shifts. you can feel the increase in power. this whole concept is a no-brainer. period : - )
Now you know two. I have ridden for hours in a row at 90 mph, but that is no where near WOT. I probably vary between 30-50% throttle riding at that speed consistently. I remember one summer, on the Sporty, coming back from Wisconsin to Mississippi. Traffic was flowing pretty fast, and I wanted to get home after being on the road for a couple of weeks. Ran thru a bunch of tanks of gas that day, running 85-95 (mostly 90) all day long.
Great question. Take a look at what the stock Harley set up feeds into you engine. Chevron gas does not get rid of that crap. Scroll down about halfway on this link to see- www.dkcustomproducts.com/overview-of-external-breather-systems-ebs.htm
Hi, I’d like to install an external breathing system to my 2009 FLHTCU with a S&S big bore kit and a Harley chisle air intake. What breather kit would you recommend? Thanks
That system would require modifications using the DIY kits found here... www.dkcustomproducts.com/diy-external-breather-systems-305.htm The install procedure can be seen here in this video... th-cam.com/video/oYSQWWJYZak/w-d-xo.html Please feel free to contact us with any questions; Support@DKCustomProducts.com 662-216-9618 Thank you for commenting!
@@DKCustomProducts ,Thanks, that is the one I ordered. I didn't get the "1st order" discount though. I'll let you know how well the installation goes. Thanks again.
Can't wait to hear your review! You can use the first discount code on any order, you will only be able to use it once. Thank you for your business!!! 😎
@@DKCustomProducts As I was cleaning my work bench, I found an old breather collection can that I got from Kuryakyn years ago. It is unused. I took it apart to compare with the DK collection can. It is a tube with holes surrounded with foam. If you want photos of it to compare to yours, let me know. I plan to use a filter but if I’m inclined to use a catch can, I’ll get yours because I think it’s a better design. Have a blessedly day.
I've got a new bike and I put a vented dipstick on it right away and I'm wondering if that would fix the sumping problem and if I installed an external breather with that dipstick would that create a negative effect with the crankcase being open at both ends?
Venting at the dipstick does not eliminate oily, hot, oxygen depleted air going into the intake. An EBS does. I would fix a sumping problem at the root...a vented dipstick is a band-aid for a sumping problem. That said, we are planning some tests this fall to answer your question and others that have arisen to the the recent popular theories.
@@DKCustomProducts Is not the crankcase pressure and the pressure at the intake bolts-back into the carb the same pressure, and if you relieve the crank pressure, that you would also prevent that positive pressure (hot air and oil vapor) from being recycled into the top of the engine?
@@ut1004bp When you vent at the tank or trans, it does reduce the amount of hot, oily, oxygen depleted air going into the intake, but it does not eliminate it....some goes out the vent and some goes into the intake. Best to use an External Breather System and have None of it going into the intake.
The guy who said that carbon deposits come from not riding on the highway and said that you can clear deposits by romping on the throttle..I think that he missed the humor in the 'Italian tune-up' jokes and took them seriously. The Italian tune-up is bouncing off the rev limiter for a moment to annoy your friends and then jokingly claiming that it was necessary to knock loose the carbon deposits.
Never done full throttle it's just too fast anyway & always had to slow down cos of long straight highway had run out of space ahh only full throttle was motocrossing on 2 stroke ding ding
I have a 21 Road King with about only 500 miles on it so far. Will the External Breather void Harley's factory warranty? Also, will any carbon already formed dissipate after EB install?
NO... THE ESB WILL NOT VOID THE WARRANTY INSTALL OF AN AFTERMARKET TUNER WILL "BLOCK THE VIN" NO WHERE IN THE GLOBAL WARRANTY DOES IT STATE THAT ALTERING THE BREATHER SYSTEM WHILE LEAVING THE AIR CLEANER IN PLACE TRIGGERS A "VIN BLOCKING EVENT" THE ONLY THING THAT YOU MIGHT GET TAPPED FOR WOULD BE ALTERING AN EMMISSIONS CONTROL DEVICE IF PEOPLE ARE REACHING AND THEN....IT WOULD HAVE TO BE A LIVE PERSON TAKING THE TIME TO REPORT THE ALTERATION TO THE MOTOR COMPANY . TUNES OTHER THAN HARLEYS PRO STREET TUNER AUTO FLAG THROUGH DIGITAL TECHNICIAN
Congrats on your new ride! 👍 Technically it can. However, we have not seen any dealership do that. To be safe, it is fairly easy to reverse it if you need to take it in for any warranty work. Yes, carbon already formed will naturally burn off after an EBS install. You may find this video interesting. th-cam.com/video/p8U4XsHyBug/w-d-xo.html
For your 22 Road Glide you do not need to retune if you are just changing out the Air Cleaner. Unlike the Twin Cams, this M8 was NOT running overly lean from factory. Here is a video on the M8 tune that you may find useful/interesting - th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html Here is a written report that you may also find interesting - www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm Thanks for commenting!
Solution: Cool down your engine so it is not burning the oil. 👍 Video series on how to do that- th-cam.com/play/PLb3bvZgbH92_3s-2vv63QggFJ3nteFd_C.html
@@DKCustomProducts many are on the list. I did remove the cats out of the CARB aftermarket slip ons and the radiating heats is a big difference, not sure if the engine itself is cooler but the exhaust is
I think with EFI squirting fuel on the intake valve keeps a lot of the carbon build up under control. And when you live in a country that test and inspects every two years installing an external breather is not an option. One place where I think performance builds miss the boat is not making performance parts that can pass emissions testing.
The carbon build up from the oil going thru the throttle body cokes on the top of the pistons. This carbon is harder and more destructive than carbon from burning fossil fuels. Any time a fossil fuel gets burned , carbon is a by product. You raise the rate that the carbon will build up by recycling the oil thru the throttle body. It is your ride ,you decide, keeping in mind all the carbon build up over time alters your compression ratio also.
I hear you. Fortunately no States in the USA have any kind of emissions inspection of motorcycles yet...not even California. As that changes, other things will need to change. In Germany, if you installed, then put it back to stock every two years for the inspection, would that work? Or are there random inspections also? This is a mod that can be done and undone in a matter of minutes is the reason I ask.
@@johnmitchell9705 Funny you should mention that idea. It is one that we have been working on to accommodate ever tightening regulations. Unfortunately, while we can cool down the air before it gets into the intake, and we can filter out the oil before it gets into the intake, we have not been able to figure out how to get oxygen back into the air so that it is a good combustion charge. So we have two of the three worked out so far. We have not given up yet. :)
This fine knowledgeable gentleman that you speak of is related to Biden, you must be patient with him. Brain damage is irreversible. Damn it I got to stop talking out loud. I am running all of your trick parts and velocity stack. My bike runs absolutely marvelous.
Yea the government AKA epa only does this crap for money related no that’s all it’s about is money thats all it is and people can’t believe are understand it are both than they say something about it oh it ain’t that much oil but over time it’s more than u can imagine are than it’ll burn off well have you ever burned motor oil well if not do it and see what it looks like and than on top it all if you run to that TB are carb it than creates a Vacuum which is just going to pull that much more
Not just oxygen depleated air...motor oil is desIgned to be volatility rated meaning resistant to burning so that it can coat cylinder walls and pistons and not burn off and leave dry cylinder/ piston contact. Thus putting that same oily mist into the combustion tract and intake will always lead to buildup of oil based carbon. A bad idea always...vent it externally!
That is one of the many reasons to vent externally! Here is a video where we done some extra testing that you may find interesting - th-cam.com/video/Z5j2Atbd-70/w-d-xo.html Thank you for commenting! MB
Absolutely can be found for less...between locating hoses, clamps, hose connectors, filters or catch-cans, can definitely be made for less, if one does not count their time or fuel for going to different stores. Our External Breather Systems are a convenience item.
I'm gonna due yu 1 bedder. I'm gonna drill holes in my stock ar cleaner, an run me 2 BK (buggar king) strawz from intake to a 6 foot hoze to a coffee can full o sawdust that's taped to my sissysbar. An yes, imma run er wide open all the way to the coast. 😯👍
The 50s and 60s had open to atmosphere crankcase vents. The breather or catch can cleaning would tell you or show you what is expelled from the crankcase especially up north. Some people have to be heard regardless if right or wrong. My thought if you can’t fix it don’t ride it. I had a vtx bike once. It had a hidden plastic catch tube behind the air cleaner. It caught tons of sludge. But the funny part was most that had sludge issues didn’t know they had it and it was full. Another foot in mouth case. I would not waste my time responding to wanna be mechanics. I enjoy your channel and products. Keep up the good work.
Man, thank you for the kind words, and we appreciate your business. Good to hear you're liking the parts.
Interesting set up on the VTX. Thanks for that. 👍
What is your thoughts on the trask trans top cover with the breather in it for the m8 I have a 20 softail standard and already have one of your intakes and external breather systems I wasn't sure if adding would be good or unnecessary ?
@@donreynolds6447 Thank you for your comment, and we appreciate your business.
Yes, in the last year there has been a lot of talk about this subject. I have seen NO data, No testing, thus No results supporting the thought that an additional breather is needed.
It does make sense (not tested or proven) that if a bike has a problem with sumping that venting the crank would be a band-aid that might help...Until the problem that is causing the sumping is addressed. I personally would fix whatever was causing the sumping.
If you have no sumping issues, then it is completely un-needed. You already are venting the crank pressure via your External Breather System.
Not only you guys don’t make much money on EBS but you guys show so well how to instal it that I got to create my own EBS system from scratch using 1-2 of your video ! We, Harley riders, appreciate you
Glad to help!
Installed the 606 with the catch can today, on my 22 triglide. Easy installation took about 30 minutes give or take 5. Noticeable difference on test ride after, definitely worth the investment.
Thanks for sharing, glad to hear you are enjoying the benefits of the parts!
We appreciate your business, and wish you many miles of smiles on your new TG! 👍
Doc Harley recently did a video on the advantage of an external breather.
I put your system on my 19 and instantly you could feel the difference.
It’s like the bike woke up!
Thank you, we appreciate your business. Yes, it can make quite a difference to put only cool, clean, oxygen rich air into the combustion chambers. That hot, oily, oxygen depleted air just takes up space in the intake charge, robbing the bike of power.
After watching many of your videos, I ordered a catch can kit for the Gen 2 M8. This is for my 2024 RG. It has some 2.7K miles now. Will be installing it this Friday when it arrives.
Awesome! Let us know how you like it. Thank you for your business and for commenting! MB
Best thing I’ve ever done for my bike! Had lots of blow by in my filter but even after 1k miles my filter is completely dry! I also did the primary vent and solved the sumping problem. What would we do without you guys on You Tube! Saved lots of bucks doing these fixes from your help. MUCH APPRECIATED!
Thank you for the kind words. We appreciate your business and are happy to hear you are pleased with the parts.
Hands down one of the best upgrades for your engine! You make amazing, quality products!
Thank you for the kind words. we appreciate your business, and it is great to hear you are enjoying the parts. 👍
Greetings from downunder I just installed a external breather on my 2014 Fatboy lo,of my own design,I used a brake fluid reservoir as the catch can after traveling 800 km I was amazed how much gunk was in it which would have ended up.inside the engine.
Sounds like you put together a good system. Yes, it is crazy how much crap gets fed into the combustion chamber in OEM condition.
I installed your EBS with catchcan and 606 air cleaner kit on my 2018 street glide special. I got great throttle response and could feel that little extra power from the nonrestrictive air cleaner. What I found in the catchcan was disgusting and wish I had purchased this sooner. While talking to my local mechanic before I went on a 600 mile trip he told me to take the EBS system off because it was actually beneficial to let that crap run back into your throttlebody and that there was vacuum coming from those tubes. According to him if I had hit the interstate on my 600 mile trip I’m more than likely would’ve blown my engine. I have a complete stage one on the bike now along with a Feuling Vented dipstick. He said to keep the dipstick but take the EBS off. I did take the EBS off because I’ll be honest this mechanic is well known and does great work and he’s constantly tearing down M8 motors because they’re blowing up. I do believe in your product and I am gonna reinstall the EBS system when I get my new gaskets . I do believe I have a issue because before I went on my trip I changed my transmission and primary fluids, I had 40 ounces in my primary and 26 ounces in my transmission. I believe there’s only supposed to be roughly five or take 30 ounces in the primary so I don’t know where the other 10 came from. When I got back from my trip my oil level had fallen down to the bottom dimple of the side stand check while it was cold where it’s normally in the middle. My bikes been running good but I do have something going on with fluids transferring
Wow, a lot to unpack in your message. Let's do the easiest first.
1. It sounds like you are having a transfer of fluid from the transmission to the primary. This was common until late 2019. Then Harley started putting a vent, as OEM, in the primary to stop that transfer. Here is a video on that subject- th-cam.com/video/B_EhFFKvHEM/w-d-xo.html
2. I do not want to offend, but I also want to be honest with you. Between your mechanic not knowing/telling you about the primary transfer, and then their advice on the EBS, I recommend re-evaluating your opinion.
3. Your year M8 is in the 2017-2019 period when HD had problems with sumping (which can lead to the engine "blowing up"). Someone should check that out on your bike and fix it, if it needs fixing, BEFORE it "blows up". The vented dipstick is just a band-aid for bikes that are borderline having a sumping issue.
4. I don't even know what to think about a mechanic that would say that an EBS could lead to an engine blowing up. I do know that if any mechanic ever seriously said that, I would never let them near my bike. There is no significant vacuum at the throttle body end of those tubes...the vacuum in the throttle body is going to take the path of least resistance, and that is thru the air filter.
Any vacuum present at the end of the tubes is NOT going to make it to the crankcase...it has to go thru the umbrella valves (which are one way...relieving pressure from the crankcase) and then thru the rocker box, and then thru the pushrod tubes, and then thru the crankshaft. It just does not happen, even if the one way umbrella valves are defective/worn out/malfunctioning.
Sounds like you already got that part figure out.
Wishing you many miles of smiles!
I have your breather bolts on my 08 fatbob and totally happy. At first I'd get a little, and I mean little, bit of spray from it but I added the 2nd piece of foam filter and it's been great ever since.
Good deal! Glad to hear they are working well for you. We appreciate your business.
Have you seen this video?
th-cam.com/video/W_8oCbO2yc0/w-d-xo.html
I've had my 606 for about a year now. Bike runs fantastic. Great low end and surprisingly cool during hot summer days. 😎
Thank you. Appreciate your business and glad to hear your bike is running well. Enjoy the wind! 👍
#metoo! 606 is my Sporty/Roadster intake.
Some engine builders say it is unnecessary if you run a vented dipstick or vented transmission cover... all I know is that my bike runs better. I also run the vented transmission cover. Keeping the snot out of combustion chamber makes perfect sense. Venting the transmission cover also helps with blowby that many owners experience, which results in excessive oil consumption. Keep these videos rolling. I enjoy them :-)
Thanks man. Glad you are finding the videos useful/interesting.
Yeah, theories abound, what we go off of is what actually works in the real world. Street Developed, Street Tested & Dyno Proven.
@@DKCustomProducts I have watched most of your videos and have learned from them... I also enjoy them. we don't always see eye to eye, but that is okay and healthy. keep up the good work : - )
Thank you! 👍
I installed you're external breathers with a catchcan on my 95 sportster. Hands join the best thing I've done. I actually had to re-tune the carb and have been saving a little money for fuel! The only things I changed are the parts that connect the breather bolts to the hose and the t fitting. I switched over to a nicer quality set of chromed, billet metal ones I had made, and a brass t fitting to go with the theme of the bike. Besides that, 100% worth it, even got a little power boost and some fuel economy out of it.
Good deal, sounds like you have it just how you want it. We appreciate your business and good words. 👍
I've got your system and it freaking works. Just put on your newest catch can and did get a little oil spray on my exhaust but I'm pretty sure it was because we were on a 1000 mile Ironbutt and I've got my can just below the air cleaner.
Thanks man! Appreciate it. Yes, give the oil level a check. Don't like to see any spray coming out...but better a little on the pipes than a lot in the cylinders.
Great vid response guys, now I will tell you my story: My baby is a FLSB 2019 Sport Glide and after watching your info on external breather system purchased it and installed it. I already had a stage 1 kit and had just had HD install a SE stage 2 kit. Now I know what my bike does performance wise as I run in the stage 1 kit a Vance & Hines FP3 and MPG/KPL (I live in Australia) and it was within spec to originals. Just prior to the install of the stage 2 kit I installed your system and it was noticed by the HD mechanics who commented (all three) they know why its done and agree with why as its all to do with certain regs. I was also about to embark on a 6900 kilometer ride from Victoria to Far North Queensland (there and back in 9 days) doing 800k's a day on the way up sitting on 120k's cruise until the tank ran dry then fill up and go again. The bike never missed a beat and I can attest MPG/KML increased by more than 10% and I ran like a dream. On return from the trip the bike was dynoed as it could not be done before I had to take the trip and the mechanics at HD stated how well the bike was running and on inspection of your system noticed how clean it was and were very impressed to the point will recommend it to anyone you asks the question on burning exhaust gases in an M8 motor or any than can take your system without an external can. Bit long winded enjoy your vids love your products (shame its hard to get them hear in OZ) keep up the great work.
Man, that is a great review of how well the EBS works.
Thank you for sharing, and glad you hear you have your bike running so sweet! 👍
I'm running your breather bolts on my '20 Road Glide Special, so I get to smell the vapor that would have been going into my motor. I'm so glad that isn't going into the motor anymore!
Same here great product
Good deal. Appreciate your business and good to hear you're taking care of your ride. 👍
I got these breather bolts on my 12 Road King as well, emailed DK and asked if they sold the replacements for the little circular filter, screens and snap rings. Well, I found the little snap rings at Ace Hardware and a guy at DK, I think his name was Dewayne emailed me back they don't sell the replacements but he gave me good info on getting the filter material and screens from Amazon. thx guys.
@@robertglancy4474 Cool, glad you're enjoying!
I have an EBS on my Softail and will definitely get one for my Ultra Classic.
Nice video!!
Thank you for your business, we appreciate it. Glad you are enjoying. 👍
I recently saw a video where Kevin Baxter of Pro Twin Performance was tearing down an M8 engine that had 80k miles on it. He said the owner took pristine care of the bike. But I noticed he didn't vent his EXTERNAL BREATHERS exhaust. The owner said there was noise coming from the engine so he took the bike in. Everything was OK until Kevin Baxter got everything torn down to the piston arms. The front one had slop in it at the flywheel. My first thought was WOW! I wonder if Kevin and Dwayne saw this before. The pistons were probably slightly out of balance due to excessive carbon build up and over time this possibly caused the slop in the front piston arm. I saw the piston heads in the video and they looked 'caked up' with thick carbon deposits. I imagine at high speeds this could cause some wear after a while (thanks to our friends at the EPA).
Yep, in no world are heavy carbon deposits on the pistons preferable, nor is pushing oxygen depleted air in the the combustion chambers.
my 2001 King loves the EBS and it looks awesome....
Cool deal! Good to hear you are digging it. We appreciate your business. 👍
Harley's of today are quite complicated with all of the EPA restrictions, EFI, and high tech components. Luckily there are still simple ways to improve performance and cooling, like these common sense approaches you guys have taken. I ordered your External Breather Kit and watched the DIY install video. Installation was easy and quick. Good work guys!
Thanks for sharing. 👍
Glad to hear the EBS is working well for you. We appreciate your business and kind words.
WOT, with water ejection, and the State Boys chasing you.
Those catch cans are Awesome.
You got that right!
My humble opinion; a big part of the problem is that people running their M8 at too low of an RPM. Your sweet spot is 3,000 RPM. So try and keep your RPM between 2,800 and 3,200.
Of course venting crankcase oil back into your combustion chamber compounds the problem.
No doubt a lot of folks run low rpm's/lug their engines...and that just compounds the problem.
My bikes a 19 eg standard. I didn't really worry about it till I changed out the plastic pos manifold while doing the cam. I vented it to the atmosphere immediately after seeing all that crap in there.
Yeah, lots of folks think the photos we have of all the crap inside their engines are somehow an exception...it is amazing what gets in there and gums up the works. Good to hear you've got it taken care of on your ride. 👍
Finally got around to cobbling my own external breather together. Pretty interesting to watch the IAC drop whenever you crack the throttle on my Powervision. The IAC temp is still hotter than I had hoped but I guess that depends on exactly where exactly the sensor is. Wish I had done it sooner!😬
Good to hear. Yeah, I like watching the output from the different sensors, learning what does what. Always looking to improve! 👍
Yeah I did this on my stock air box on a 2012 Road Glide years ago and I couldn't believe the power boost it was like I did a stage 1 . It also helps in cooling the motor down.
Good to hear, glad you have your RG running so nicely. 👍
Dk.
I'm writing from Italy,
At the end of 2019
I bought a 2006 Fatboy 88
One of the first thing I did, made a catchcan
And reroute the system
Best thing I did.
By chance couple months ago I stumbled on your site , excellent
Info.
My first bike was a 1946 knucklehead
Way back1969.
Keep up the good work
Arrivederci 👍
Greetings! Glad you are liking the videos!
Good to hear you are keeping your bike clean and running well.
A knuck... very cool. Sounds like you have enjoyed your rides! 🙂
@@DKCustomProducts
Yes have many many good memories of the old days!!!
For example late 60s early 70s me and an other scooter tramp bought a 1956 Police special everything on it except siren and Buble
Running $75.00 .
You remember stompin 76 Galax Virginia?
Comment on the external breather
After about 2500
Miles I drained the can
Got Les than a tea spoon of oil mostly condensation,
Drained it again 5000mls
This time no cond.
Hardly any oil
How do you explain that.
Thanks for your time.
@@lucianopasqualucci126 Very cool, those were the days.
In 76 was when I rode my first Sporty...out in California. Did not know about the festival at the time. Sounds like a great time. Those were the days for sure.
Sounds like you have a bike that does not spit much. First 2500 miles were either in colder weather or shorter runs, or both. Thus the condensation. Next 5000 miles probably hotter weather or longer runs, or both.
Sounds like you do not have much of a spitter. There are pretty big variances on how much oil gets spit...but they all have hot, oxygen depleted air...and keeping that out of your intake is always a good thing for performance.
@@DKCustomProducts i appreciate your reply,
Looking back you are absolutely right on your comment"cold weather and short runs,hot weather longer runs.
I will pay more attention on that.
On the small quantity of oil spitting, that's a good sign low blow-by.
Thank you again for your time.💪👍
@@lucianopasqualucci126 Thanks for the feedback. Stay safe and enjoy the ride!
Good video. What I think a lot do not understand is there will be a bit of oil getting past the rings and valve guides, why would anyone want to have the head breathers being put anywhere near a vacuum source to help suck that oily moisture into your engine. Keep up the knowledge, it always equal power, Nuff Said
Hey Jack! Thanks for the comment. Yeah, always is amazing to me too.
One thing i noticed is some harley owners (its new to me this year) is having things so back assward when it come to allot of issues.
External breather causes sumping on a carbed bike???(mines carbed 2000fxdwg) unless you have somehow obstructed your vents. Thats not why someone developed sumping if properly done.
Mine was easy to vent externally because it was equipped with the old cv carb se filter kit. Its a new to me bike that had domed high comp pistons, had allot of pre ignition issues/and hot starting was brutal, at 220psi ccp no wonder. I have 1000 miles on new flat top pistons, that gave me 185ccp, about 10.2:1 now.
Way better!
We will see about the carbon buildup running an external breather.
Im also interested in that coil relocate of your guys. But i want to rig up a temp sensor on my carbed bike to verify the claimed temp reduction my😁
Yeah, absence of an EBS should not cause sumping.
Glad you got your bike dialed in. 👍😎👍
I’ve run external breathers in all my evo bikes and I agree with y’all I finally found your kit for my 08 heritage and your e-mail says I’ll receive your kit Monday can’t wait to put it on ,,,,,,, by the way I see Arlen ness has a filter kit my question is what good is his if it doesn’t vent out side the intake
Usually a bike will see more power out of an AN air cleaner than a stock one....Just not as much as it could if it had an External Breather.
Two things you can do to keep carbon build up out of your engine. #1 install the DK customs catch can. #2 run 93 octane ethanol free gas.
Thank you for the good words, appreciate your business. 👍
@@DKCustomProducts after installing your catch can, I could tell a difference in throttle response immediately.
You mean Dwayne doesn't ride WOT?, all of the time?.
I bet y'all sit around the table ( even at The Dinner 🔔) , and shake your heads with laughter, from some of the comments.
Thanks guys for providing us with videos of knowledge, and laughter.
✌
No, Dwayne is not a WOT guy.
Glad you're liking the vids. 👍
@@DKCustomProducts lol
Bless his heart
Based on your cfm results, looking at the cfm being 'breathed' out (I'm going by the data on your website), is it really worth it to add an external breather to a stock EFI Sportster? Your data for the Sportster was that the cfm 'breathed out' was very small. Thanks for your good work and efforts.
It is true, the typical Sporty will not push as much hot, oily, oxygen depleted air into the combustion chambers as a Twin Cam.
But a Sporty is still pushing that crap into the engine, and it is just a matter of time before there is enough build up that the tune will no longer match the increased compression.
ALSO, IMMEDIATELY there is a gain in power from only clean air going into the intake after an EBS is installed on a Sporty.
Here are a couple of links of dyno runs on Sportsy, with and without an EBS.
www.dkcustomproducts.com/media/wysiwyg/DynoComp_1.jpg
www.dkcustomproducts.com/media/wysiwyg/breathertest_1.jpg
Here is a link to more info on the benefits of an EBS.
www.dkcustomproducts.com/overview-of-external-breather-systems-ebs.htm
Every individual has to decide for themselves if it is worth it. I would never run any engine I cared about without an EBS.
I’m new to Harley’s what is your advice on a 107 m8 as far as build up of carbon, I had cobra slip ins fitted but haven’t done anything about changing to filter yet, the bike is brand new but I have put 2500 miles on it
Stop building it up, and what has already built up will burn off. Here is a video you may find interesting/useful- th-cam.com/video/EfDeFZblMck/w-d-xo.html
I'm running a DK Customs external breather system (EBS) and I noticed that after a few months, my hoses that came with the kit start cracking. I just chuck it up to wear and tear because of how close it is to the engine and exhaust.
How often does everyone else have to change out their rubber hoses for their EBS?
***By no means am I knocking the product. I'm very satisfied with my EBS***
Hose should not be cracking. I have had EBS hose on a variety of bikes for many years, and 10's of thousands of miles, with no visible degradation. I suspect that the engine is running very hot, and/or the hose is very close to it.
Another possibility is that there may be some cleaner that you are using that is not rubber friendly.
If you are in the USA, give an email or a call to the contact info below-
Support@DKCustomProducts.com
662-252-8828
Let them know that Kevin said we would send you another length of hose for your EBS at no charge.
If you are outside the USA, check and see if your local auto parts store has the hose you need, then let us know what you spent to get it...should be less than $7, and we will take care of that for you.
Route it with at least 1 inch between the hose and the engine, and at least 2 inches between the hose and the exhaust.
Thank you for your business, and for letting us know. 👍
@@DKCustomProducts thank you very much. I sent an email about it. I appreciate your great customer service and keep the awesome videos coming!
@@d.mar.2624 We appreciate your kind words man. Glad you're liking the videos, thanks for watching! Ride safe!
Is there a bolt on backplate set up for external breather ? I don’t trust myself to drill on my S.E backplate , rather just buy a new one
Dunno what bike you have, but here are some good choices on Air Cleaners that already have an External Breather System.
www.dkcustomproducts.com/air-cleaner-intake-c10.htm
I have a 2020 Street Glide. I installed a Screaming eagle air intake. I want the catch can assembly. Can you help me?
Yes, you can see options at the following link.
You can also email or call and discuss your options, get any questions answered...
Support@DKCustomProducts.com
662-252-8828
www.dkcustomproducts.com/diy-external-breather-systems-466.htm
I notice DK site seems to have no crankcase venting solutions or offerings (other than air filter kits).. Just wondering the reason
Every External Breather System we have is a crankcase vent. The Systems we have prevent 100% of the hot, oily, oxygen depleted air from going into the throttle body and combustion chambers. This extends the life of the engine, gives more power, runs cooler, and prevents tune instability.
You are probably asking about the vents that have become the fad in the last year that vent at the actual oil tank. With these there is still some hot, oily, oxygen depleted air being fed into the intake & they cost more. It is spending more and getting less benefit.
@@DKCustomProducts no, not at the oil tank, but at the port opening between crankcase and. Oil tank under the transmission top plate cover
@@ut1004bp same-same. That is not where the engine was designed to vent.
Do yall sell a tank lift for cooling or can you direct me on where I can get one. I ride a 2013 H.D. FXS BLACKLINE
Yes, you can see them at this link- www.dkcustomproducts.com/softail-tank-lift-kits-c30-56.htm
And here is a little video on them- th-cam.com/video/KokKdOdDM6E/w-d-xo.html
I have these breather systems on both my 12 and 13 RKCs and my 18 Ultra LTD. The only real argument against this that I question is the loss of vacuum by routing to a catch can.
Is this a concern?
It is not.
The recently circulating theory of needing vacuum from the intake for better ring seal is just that, a theory. No tests or evidence has been posted showing that to be true.
The holes in the tubes in the intake (and subsequent passageways back to the crank case) are so small that the vacuum created in the intake takes the path of least resistance, pulling in thru the filter element, not the breather tubes.
btw, I've seen a couple of videos of folks trying to measure that phantom vacuum thru the venting system. They were both honest in disclosing that they could not get any measurable reading
@@DKCustomProducts - Thanks. I kind of thought this may have been a ghost chase as well. Especially considering if any significant vacuum existed, we wouldn't find oil gathering on our intakes and dripping off our air cleaners without breather set ups. It would get sucked into the intake when open and it doesn't (not anywhere near all of it anyway).
I have these on all 3 of my current bikes and I think they are great. Thanks!
Would it be good to have a EBS for my 05 Sportster 1200xlc? It’s carbureted.
Yes, whether an engine is EFI or carbed, it is not good to have hot, oily, oxygen depleted air going into the combustion chambers. Your carbed Sporty will run better and longer with an External Breather System.
Here is a vid you may find interesting- th-cam.com/video/EfDeFZblMck/w-d-xo.html
You guys should totally do a video on how to get carbon buildup off while you have the engine apart or the cylinder heads off
None of our bikes have carbon buildup to take off. 😀
If we do run into a bike that has some buildup and we have it apart, we will do that.
Thanks for the idea.
@@DKCustomProducts after watching this video I'm definitely going to buy a breather from you guys for my Dyna Fat Bob.
@@aragos32727 Thanks man, appreciate your business. I believe you will be well pleased with it.
What is better, filter or catch can? I have a 22 lowrider s with an s & s steath air stinger cleaner with the tear drop cover. (puking oil)
If you are puking a lot of oil, it may overwhelm the filter and drip some, so a catch-can would be more beneficial to stop that.
As far as performance improvement, the engine does not car if it is a filter or catch-can, all it cares about is that there is no longer hot, oily, oxygen depleted air going into the combustion chambers...so for functionality, they are equal.
@@DKCustomProducts you are awesome. Thank you
Thanks man, appreciate your business.
Feel free to email or call with any questions.
Support@DKCustomProducts.com
662-252-8828
These people walk among us every day , it’s hard to ignore them
Yes, and yes. You are 100% correct. 😬
What do you need to do for the bike that has about 20k miles after you install the external breather at this point in its life?
Ride it. Preferably some longer rides. That crap will burn off with time. 👍
Do I need to clean or replace the little mesh with the cottons on the external breathers? haven't done nothing to them since i got them from you guys. been yearrsssss!
It is not 100% necessary, but does not hurt. Sometimes I go quite a few miles without cleaning them...Once, well over 20K. Below is a video on how to go about it. However, it does not change the efficacy of how they work...just if they will dribble a bit or not.
th-cam.com/video/W_8oCbO2yc0/w-d-xo.html
@@DKCustomProducts thank you! DK always delivers.
Do I need to, or should I retune the bike after adding an external breather, since it obviously changes the air fuel ratio ?
It does not change the AFR. No need for a retune. The oil mist is relocated to the catch can instead of the combustion chamber. No more coke in the chamber.
The change in the AFR is small and the ECM will adjust for it.
Here is a video on the ECM that you may find interesting- th-cam.com/video/0vbTkRvFa80/w-d-xo.html
And here is a video we made answering the question of if you need to tune the bike when venting externally- th-cam.com/video/2BpGbBnfMkY/w-d-xo.html
Thanks!
I run your external breather setup and my bike runs so much better... :-)
Thank you for your business, and your comment. We appreciate it. Good to hear your bike is running so much better. 👍
@@DKCustomProducts for those who have not yet committed to this setup... the minute I installed the external breathers on my stock 114 engine, it revved quicker and higher in between shifts. you can feel the increase in power. this whole concept is a no-brainer. period : - )
I know someone who does a minimum 90 miles an hour for at least 1 hr non stop
Now you know two. I have ridden for hours in a row at 90 mph, but that is no where near WOT. I probably vary between 30-50% throttle riding at that speed consistently.
I remember one summer, on the Sporty, coming back from Wisconsin to Mississippi. Traffic was flowing pretty fast, and I wanted to get home after being on the road for a couple of weeks.
Ran thru a bunch of tanks of gas that day, running 85-95 (mostly 90) all day long.
Carbon build-up? I was told that Chevron gas has techroline, and keeps valves clean. Right or wrong?
Great question. Take a look at what the stock Harley set up feeds into you engine. Chevron gas does not get rid of that crap.
Scroll down about halfway on this link to see-
www.dkcustomproducts.com/overview-of-external-breather-systems-ebs.htm
@@DKCustomProducts Yeah. Thanks. I do NOT want hot oil in my carb, for sure.
@@billcarp3523 Yeah, and that oxygen depleted air is a power robber too.
Hi, I’d like to install an external breathing system to my 2009 FLHTCU with a S&S big bore kit and a Harley chisle air intake. What breather kit would you recommend? Thanks
That system would require modifications using the DIY kits found here...
www.dkcustomproducts.com/diy-external-breather-systems-305.htm
The install procedure can be seen here in this video... th-cam.com/video/oYSQWWJYZak/w-d-xo.html
Please feel free to contact us with any questions;
Support@DKCustomProducts.com
662-216-9618
Thank you for commenting!
@@DKCustomProducts ,Thanks, that is the one I ordered. I didn't get the "1st order" discount though. I'll let you know how well the installation goes. Thanks again.
Can't wait to hear your review! You can use the first discount code on any order, you will only be able to use it once. Thank you for your business!!! 😎
@@DKCustomProducts As I was cleaning my work bench, I found an old breather collection can that I got from Kuryakyn years ago. It is unused. I took it apart to compare with the DK collection can. It is a tube with holes surrounded with foam. If you want photos of it to compare to yours, let me know. I plan to use a filter but if I’m inclined to use a catch can, I’ll get yours because I think it’s a better design. Have a blessedly day.
Thank you! Let us know how you like the external breather kit! 👍
Would it be illegal for the H-D company to install an EBS that functioned just like yours does, at the time the motorcycle is being built?
I do not know the legal terminology. However, HD cannot install these as OEM and sell them.
@@DKCustomProducts Thank You for your response!
My 04 has 2n1 can I go back with dool pips
Can't think of any reason you could not run True Duals on your 04.
I've got a new bike and I put a vented dipstick on it right away and I'm wondering if that would fix the sumping problem and if I installed an external breather with that dipstick would that create a negative effect with the crankcase being open at both ends?
I've seen a good number of mechanics report that they've only seen sumping on engines that have Stage 3 and Stage 4 upgrades!
Venting at the dipstick does not eliminate oily, hot, oxygen depleted air going into the intake. An EBS does. I would fix a sumping problem at the root...a vented dipstick is a band-aid for a sumping problem.
That said, we are planning some tests this fall to answer your question and others that have arisen to the the recent popular theories.
@@DKCustomProducts Is not the crankcase pressure and the pressure at the intake bolts-back into the carb the same pressure, and if you relieve the crank pressure, that you would also prevent that positive pressure (hot air and oil vapor) from being recycled into the top of the engine?
@@ut1004bp When you vent at the tank or trans, it does reduce the amount of hot, oily, oxygen depleted air going into the intake, but it does not eliminate it....some goes out the vent and some goes into the intake.
Best to use an External Breather System and have None of it going into the intake.
Saving my pennies to get one for my bike.
Thanks man, appreciate your comment. I believe you will be well pleased.
The guy who said that carbon deposits come from not riding on the highway and said that you can clear deposits by romping on the throttle..I think that he missed the humor in the 'Italian tune-up' jokes and took them seriously. The Italian tune-up is bouncing off the rev limiter for a moment to annoy your friends and then jokingly claiming that it was necessary to knock loose the carbon deposits.
Ah, never heard that joke. You may be right!
Never done full throttle it's just too fast anyway & always had to slow down cos of long straight highway had run out of space ahh only full throttle was motocrossing on 2 stroke ding ding
Glad you're enjoying your ride. 2 stroke motocross days...those are some memories!
I have a 21 Road King with about only 500 miles on it so far. Will the External Breather void Harley's factory warranty? Also, will any carbon already formed dissipate after EB install?
NO... THE ESB WILL NOT VOID THE WARRANTY INSTALL OF AN AFTERMARKET TUNER WILL "BLOCK THE VIN" NO WHERE IN THE GLOBAL WARRANTY DOES IT STATE THAT ALTERING THE BREATHER SYSTEM WHILE LEAVING THE AIR CLEANER IN PLACE TRIGGERS A "VIN BLOCKING EVENT" THE ONLY THING THAT YOU MIGHT GET TAPPED FOR WOULD BE ALTERING AN EMMISSIONS CONTROL DEVICE IF PEOPLE ARE REACHING AND THEN....IT WOULD HAVE TO BE A LIVE PERSON TAKING THE TIME TO REPORT THE ALTERATION TO THE MOTOR COMPANY . TUNES OTHER THAN HARLEYS PRO STREET TUNER AUTO FLAG THROUGH DIGITAL TECHNICIAN
Congrats on your new ride! 👍
Technically it can. However, we have not seen any dealership do that. To be safe, it is fairly easy to reverse it if you need to take it in for any warranty work. Yes, carbon already formed will naturally burn off after an EBS install.
You may find this video interesting.
th-cam.com/video/p8U4XsHyBug/w-d-xo.html
@@paulhood7316 Thank You Paul
@@DKCustomProducts Thank You
its like the guys on facebook that like to argue with you that dont no how to change the plugs
I'm not familiar with this...probably because I do not go on facebook much. Dwayne and Cristy do most of the facebook stuff for DK.
If you switch air breathers do you have to re tune the bike
What year/model bike do you have?
2022 rodeglide
I have the screaming Eagle air filter the round one that comes on the 114 I was wanting the cone extreme breather
For your 22 Road Glide you do not need to retune if you are just changing out the Air Cleaner. Unlike the Twin Cams, this M8 was NOT running overly lean from factory.
Here is a video on the M8 tune that you may find useful/interesting - th-cam.com/video/Lb_57Z_Ipms/w-d-xo.html
Here is a written report that you may also find interesting - www.dkcustomproducts.com/milwaukee-eight-dyno-charts-other-interesting-info-dk-m8-rpt.htm
Thanks for commenting!
@DKCustomProducts amazing content love the channel, thanks for giving me advice
I definitely don't like the smell of burnt oil. Makes me seem something is worng with the bike.
Solution: Cool down your engine so it is not burning the oil. 👍
Video series on how to do that- th-cam.com/play/PLb3bvZgbH92_3s-2vv63QggFJ3nteFd_C.html
@@DKCustomProducts many are on the list. I did remove the cats out of the CARB aftermarket slip ons and the radiating heats is a big difference, not sure if the engine itself is cooler but the exhaust is
I think with EFI squirting fuel on the intake valve keeps a lot of the carbon build up under control. And when you live in a country that test and inspects every two years installing an external breather is not an option. One place where I think performance builds miss the boat is not making performance parts that can pass emissions testing.
The carbon build up from the oil going thru the throttle body cokes on the top of the pistons. This carbon is harder and more destructive than carbon from burning fossil fuels. Any time a fossil fuel gets burned , carbon is a by product.
You raise the rate that the carbon will build up by recycling the oil thru the throttle body. It is your ride ,you decide, keeping in mind all the carbon build up over time alters your compression ratio also.
@@jackklarich7045 I get that and agree however some countries or even states keep a close eye on modifications so it is a no go in Germany.
I hear you. Fortunately no States in the USA have any kind of emissions inspection of motorcycles yet...not even California. As that changes, other things will need to change.
In Germany, if you installed, then put it back to stock every two years for the inspection, would that work? Or are there random inspections also?
This is a mod that can be done and undone in a matter of minutes is the reason I ask.
@@DKCustomProducts If there was a product that would catch the oil before it is passed to the intake that would likely work around restrictions.
@@johnmitchell9705 Funny you should mention that idea. It is one that we have been working on to accommodate ever tightening regulations.
Unfortunately, while we can cool down the air before it gets into the intake, and we can filter out the oil before it gets into the intake, we have not been able to figure out how to get oxygen back into the air so that it is a good combustion charge.
So we have two of the three worked out so far. We have not given up yet. :)
I have an 05 softail efi filter or can?
Either will work. Here is a video going over the pros and cons of each.
th-cam.com/video/WVZbsLPzmZk/w-d-xo.html
Some people are clueless.
It happens.
Don’t wanna pay a shop to experiment at 75 bucks an hour then mess it up
Here is a video you may find useful-
th-cam.com/video/uAmPC_kglJk/w-d-xo.html
This fine knowledgeable gentleman that you speak of is related to Biden, you must be patient with him. Brain damage is irreversible. Damn it I got to stop talking out loud. I am running all of your trick parts and velocity stack. My bike runs absolutely marvelous.
We appreciate your business and it is great to hear your bike is running well with our parts. Enjoy the wind! 👍
Yea the government AKA epa only does this crap for money related no that’s all it’s about is money thats all it is and people can’t believe are understand it are both than they say something about it oh it ain’t that much oil but over time it’s more than u can imagine are than it’ll burn off well have you ever burned motor oil well if not do it and see what it looks like and than on top it all if you run to that TB are carb it than creates a Vacuum which is just going to pull that much more
👍🏾
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Not just oxygen depleated air...motor oil is desIgned to be volatility rated meaning resistant to burning so that it can coat cylinder walls and pistons and not burn off and leave dry cylinder/ piston contact. Thus putting that same oily mist into the combustion tract and intake will always lead to buildup of oil based carbon. A bad idea always...vent it externally!
That is one of the many reasons to vent externally!
Here is a video where we done some extra testing that you may find interesting - th-cam.com/video/Z5j2Atbd-70/w-d-xo.html
Thank you for commenting! MB
this person does not ride a Harley Davidson. great job guys.
Thanks man, glad you're enjoying the videos. 👍
👍👍
Thanks man.
Top notch products and top not h people
Thank you for the good words, we appreciate it. Glad you are enjoying the parts. 👍
Very little money for hoses 🤣 Ya right that's why i made my own kit.
Absolutely can be found for less...between locating hoses, clamps, hose connectors, filters or catch-cans, can definitely be made for less, if one does not count their time or fuel for going to different stores. Our External Breather Systems are a convenience item.
He wanted to be heard.
We heard him...then he disappeared.
@@DKCustomProducts might be a great thing.
Some people will never understand. Lol
There is a proverb about that somewhere. 👍
Comment
:)
I put external on my 103 runs alot better
Good to hear, thank you for your business, and the comment. 👍
So the external breathers are ok on carbs
Yes, just as important on carbed bikes. You do not want that crap going into the carb or the combustion chambers.
@@DKCustomProducts thanks
@@jonsixxx6569 Welcome.
You may like the photos and info at this link- www.dkcustomproducts.com/overview-of-external-breather-systems-ebs.htm
I'm gonna due yu 1 bedder. I'm gonna drill holes in my stock ar cleaner, an run me 2 BK (buggar king) strawz from intake to a 6 foot hoze to a coffee can full o sawdust that's taped to my sissysbar. An yes, imma run er wide open all the way to the coast. 😯👍