Spark plug wiring | Doc Harley | Upgrades
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- เผยแพร่เมื่อ 1 ก.ย. 2021
- This week, Doc Harley answers a question about spark plug wires by providing a brief history of spark plugs, wiring and the upgrades that have been made over the years.
#sparkplugs #wiring #harleydavidson - ยานยนต์และพาหนะ
Thanks Doc.....More so Thanks to Low Country Harley for giving Doc the time and the tools to show us these videos.....
Thanks for the shout-out!
We've done lot of testing of different wires, paying specific attention to the Ion Sensing on the Twin Cams. Making sure to keep the resistance in the proper range for the system to work can make a significant difference in performance.
I am impressed by your dedication to give owners the best products..Doc
@@LowCountryHarleyDavidson Thank you Doc, appreciate your good words.
I'm really liking that chain driven bar hopper behind you Doc...Thanks for another informative vid.
Doc, it never gets old learning this stuff from you! Thank you for your simplistic explanation and knowledge shared with all us Knuckleheads! Still the man!!
I am grateful you are watching….Doc
I just want to say that I have immense appreciation for this channel and the knowledge in every video. Thank you for what you guys do here. 😊
I appreciate that!..Doc
Plug wires are so complicated that they're simple. Thanks Doc.
Awesome video, finally someone explained it right, and the way I can understand. Thank you Doc!!
Glad it was helpful!...Doc
That was a great explanation, thanks DOC!
Thank you...Doc
That was a well thought out video. Clear and concise.
You didn't dictate what we should do, you gave us info and suggested we make up our own mind.
As for me, I stay with Harley parts. The only Harleys I have found dead by the side of the road had aftermarket parts. The screaming eagle wires I bought for my 2000 wide glide are awesome. They have about 45,000 miles on them and they work like new. I should probably run a test on them but the bike starts instantly and runs great.
Love the history lessons thanks Doc 🇺🇸🐾🍻
Doc has helped me tremendously with my questions about upgrades and maintenance. Love ya Doc!
I have asked few questions and he has never replied !!
Always look forward to your tips Doc . Thanks for what you do ……
Another great video! Always very knowledgeable!
Always informative and helpful 👍 Thanks Doc
Thanks Doc....just picked up my 21 RG CVO....going from 2005 Twin Cam to M8....the learning continues
Thanks Doc. Great information again.
Excellent info! THANK you Doc for the tip!
Thanks for taking the time to watch...Doc
Wow, just learned something new. Thank you Doc!
Glad to hear it!...Doc
greetings from Germany, thank you Doc. I haved learn from your Videos at TH-cam Wien i was a beginnen in the Harley World
I replaced my stock wires for Screamin’ Eagle wires on my ‘08 FXDF along with Accel u groove plugs. I switch out the plugs every 6 months because I can. The original stock wires were 10 years old so I thought it was time. I have a Stage 1 set up and really enjoy my HD. I know I over maintain my bike but it give me great joy. Fluids every 4-5k and brake fluid every February ( once temps are back to 60’s). Enjoy your videos, just thought I’d share.
Always enjoy viewers sharing personal stories about their Harleys..Doc
Great info all the time , truthful & honest Intel so I can make the best decision for my bike !! Thanks Doc ! Your vids are very helpful!! 👍
Awesome thanks for your honesty!
Oh man Doc excellent video. That ion sensor is a very critical part I didn't know about. Thanks for the information as always
Very informative,thx Doc.
thank you for showing what to look for in aftermarket, I love keeping everything Harley but times are tough
Glad I could help. I understand, times are tough.Keep it rolling...Doc
It's always such a pleasure, just to listen to Doc's wisdom.
Thanks Doc
Great one Doc I especially liked the parts about resistance and the use of resistor plugs. So glad you didn't get into resistance matching it would have taken all day and unless it's applied to a race bike doesn't gain a whole lot.
Thanks Doc !! You’re a legit PHD !
Excellent explanation as usual Doc!! I've heard guys say they put the Screamin Eagle wires in their M8 and they "feel" a difference. Good to know that is BS. I was going to get orange Phat wires for my Ultra to match the paint more than performance, but I might wait for just cosmetics. Thank you!!
Great tech tip Doc. I have the S.E. Spark plug & S.E. Spark plug wire. I always thought I was getting more HP power.. lol
Oh well at least it looks cool in Red.. Thanks for taking the time to do these videos. 👍🏻👍🏻👍🏻
Great video. Never knew this. I have a twin cam 2014 street glide was about to purchase wires outside of HD which brought me to this video
Great information Doc thanks
Good stuff,time for wires,plugs,maybe coil just to refresh system on 12 st.glid.
Thank you sir 👍🇺🇸🇨🇱✌️
Thanks for watching Alvin…..Doc
Good stuff Doc! Thanks…
Always appreciate your videos, especially that you are interested in helping owners understand and not hustling parts. Been through a few electronic ignitions on my '86 Sportster (similar to the bike behind you, including the S&S carb), but little by little I've reached back a bit and installed a points ignition with copper core wires. Cheap (as you note in the beginning), easy to static time to the advance mark with nothing but a screwdriver, feeler gauge, and a slip of cellophane. Runs like a champ (or at least a champ with 98,000 miles on it). A bit more maintenance intensive, but at 71, with a couple of beers, what else do I have to do beside fiddle with my old bike and ride it?
love your story...Doc
I installed a set on my 2019 FLTRXS mainly for the looks. I replaced the spark plugs at that time since they were the ones that came with the bike. Excellent video. Thanks. Doc.
Thanks for sharing...Doc
Thanks Doc, I listen to you a lot an you have given me a lot of great infoe,an helped me out a lot, Thank You Again
You are very welcome...Doc
Thanks Doc , found this post and you nailed it as always . During the winter I was looking at my wires on my 2008 twin cam and found one that was rubbing against the fuel line coming off the tank and it took a chunk out of it . I went with the Screaming Eagle wire kit and also too,the time to route the wires better so they don't touch anything
Glad it helped….Doc
I have Accel 8.8 spark plug wires , with Accel Super Coil on my 1983 FXWG. Been on it for over 20 years.
Thank Doc , you came thru .
I appreciate your history lesson and all your wealth of information. 👍 👍
Thanks for watching…..Doc
Thanks Doc. Always learn from you
Thanks for tuning in….Doc
From Saskatoon Saskatchewan Canada just bought a 2013 Tri glide or should I say Geezer Glide lol love your tech tips
Thanks Gordon….Roll On Geezer….Doc
I put the SE fat wires and SE plugs in my twin cam softail. It seems to start easier. Put the SE fat wires on my ‘21 softail for aesthetics though it seems to run a little smoother. Plan on putting the SE wires and plugs in my ‘19 RGS this winter.
Nice video, Thanks for the explanation. Experience shows that "aged" plugs and wires cause the ECM to regulate to a safer setting. That reduces power. The longer your wiring and plugs are 100%, the better the ECM can regulate. It's not about 10 horses, but a good ignition system keeps your engine healtier.
Great point!..Doc
As usual great advices
as always .... great video Doc ..... im always informed ... keep up the great vids.
Thanks, will do!..Doc
Extra good information...thanks .
Doc, I went to Accel stealth coils.09 fxdf. Had them on for 5 years. No problems, love them.
I have been waiting for a long term report, Thanks…..Doc
Thanks Doc! 👍👍 🇨🇦
Nice shout out to DK Customs, I have several of their parts on my bike. Great company to do business with. Very good video Doc, I've learned a ton from you. Thank you!
So you have seen this on the Net too? Ha Ha...Doc
Thanks doc. Stay well my friend
Thanks, you too.....Doc
Hi Doc! Best greetings from Sao Paulo/Brazil ! 👍
Welcome and thank you for watching…Doc
Thanks Doc.
Doc, thank you. I'm getting a knock at certain throttle-on loads, even at idle. I believe it's my throttlebody butterfly valve chattering. This happened after I put on the Phat wires (stock plugs), high flow air filter, V&H Power duals, S&S 475C cam and oil pump, and a canned Fuel Moto tune. I'm now adding a S.E. 55mm aluminum intake manifold and doing an actual dyno tune at the dealership this week. Should I go back to stock plug wires? Have you ever heard of this butterfly valve chattering? Could it be something else? The tech said Harley is all over the place with tolerancing on their throttle bodies and that I might have gotten one out of tolerance or on the high side of it. Any thoughts at all? I appreciate it!
Sounds like I’m good to go on my Evo springer.
Great video! Thank you for making it and putting out this info.
My 2 cents: some folks might presume that modern Harleys have Knock Sensors to detect detonation in the cylinders/combustion chambers (re: such as found in cars) which communicate (provide input) to the ECM/ECU and then an output signal to retard timing to counter the detonation. However, Harley is using Ion Sensing (ECU measuring the resistance of [spark plug wires & the spark plugs]. Very critical to use the correct spark plug wires & spark plugs for the Ion Sensing software to operate correctly. On Baggers, 2014 and newer: Rubbing issues with spark plug wire (wires?) to # 1 cylinder??? News to me.
I love that you're using a drain table for this video
best multi-use table...Doc
Thanks Doc
I’m loving that bike on the lift behind him,
Good old Sportster...Doc
Shockingly simple
Thank you very much.
You are welcome!...Doc
OK thanks Doc
Goob info Doc. Thanks
Always had an extra set of Chevy six cylinder points and condenser for the old Shovel. loved those bikes. Toyota U-grove plugs did the best. ND16
Thanks for sharing...Doc
My 2019 RGS with 50,000 miles started running very sick after a bath or riding in heavy Florida rain.
Wasn't sure what caused this issue to suddenly start as my dealership had just done a head, piston and cylinder rebuild on my bike. I did go back to them and mentioned what had happened and they had no idea without a proper inspection as my bike had not thrown any codes.
Since watching your video and another one about plug wires you both mentioned the rubbing issue, this I think is my problem and Im going to make a trip to my local dealership and pickup a set of red phat wires.
Going with the red phat ones as more protection, my bike is red and I know they are gonna give me lots more hp ;)
Very interesting video! People do not realize big horsepower costs big bucks. Even a few horsepower requires more than new spark plug wires. Buy a bike for the horsepower from the factory and keep it stock.
U da man 👍
Thanks
I like the new sparkplugs
I watch it alot
Thanks sir
Didn`t they stop using Ion sensing in the M8 when changed to the knock sensors on the heads?
Whats your opinion on the coil pack ? Accel Stealth super coil
Hey Doc, thank you for all that you do with this channel, I’ve learn a ton from you and your videos.
Wanted to ask you, do you recommend gapping my plugs smaller than 0.040 if I’m running a points ignition?
It’s a 1994 evo big twin with points ignition and mechanical advance.
Thank you
Yes. BTW have you looked at a Dyna S ignition? It uses the same flyweights so you can put the point plate with cam in your saddle bag in case you break down. I really like it.
@@LowCountryHarleyDavidson would .020 be a more appropriate setting for points? And I have seen those yes, never tried one though, I will give them a look. Thank you!
I run ngk plugs with no resistor. 2002 fxstd deuce, carb, twin tec ignition, rinehart cross backs, 1/4 turn throttle, coil relocation.
Iv got 8mm accel plug wires on my 09 sportster1200 custom i made shure they wouldn't mess with the ion sensing they been on it now 700 miles does good
Sportsters dont have Ion sensors...Doc
Hi Doc, how do you get the fuse box off of a 2005 wide glide to be able to install the siren 2? I tried, but the box does not want to come out very far at all. Also, I used your tip to clean my fuse connections and put bulb grease on the fuse connections after cleaning the light corrosion off. Thanks !
Glad our tech tip helped. You are right, after the top and side allens are removed the fuse block will only come out so far because of the wire harness...Doc
Thankful for you Doc and wish you are doing well! I do not respect some of the you tubers but I do U. I just upgraded my ride to a Sport Glide 107 manufactured in june of 2019 hopeful that she was given the oil pump upgrade🙏. Aside from the plugs, are U saying that if I install wires that have 1 tenth of the resistance of stock wires that she will not get a better burn of the charge? If so why? Take care of yourself please.💪💪💪
In my opinion, with better made spark plug wires the efficiency and longevity is improved. But the manufacturer coil and spark plugs are only going to “perform” within the standard’s designed. Now a coil made to perform stronger with efficient plug wires and iradium spark plugs could deliver a stronger spark. On the street would you feel the difference, maybe. Starting yes, idle and acceleration only if the timing and fuel is there to match. I have often wondered if improving this area would effect the anti-knock system on Twin Cams that the ECM measured the resistance of the spark to adjust the timing🤔….Doc
I've been involved in these debates i just change my plugs and wires more frequently
I love how doc pulls out parts that Hareley and the Davidsons used back in the day 😄
Ha Ha! The advantage of being a Senior Tech.....Doc
Great video doc. I recently changed my spark plugs for the NGK Iridium IX DCPR7EIX Spark Plugs for 1999-2016 Harley Davidson Twin Cam (Pair), and from what I understand on your video I shoukd keep the wire until its time to change it since there's no difference, correct? Or if theres a wired youd recommend that would compliment the new plugs as well as be compatible with my 2016 sportster 883 ?
Sumax, Taylor and MSD offer very good wires….Doc
That’s a good looking Sportster in the background. What year is it? And what mag wheel is on the front?
1990 and i believe an old Performance Machine wheel...Doc
I put E3 plugs on my 2017 deluxe, but still have stock wires. Will this present a problem down the road ?
Unknown...Doc
I saw a video once all they did was change the stock HD copper plugs to the ngk irridiums. They claimed it dynoed 2 hp more with just these plugs. Thoughts?
I can believe the Irridium is more efficient but 2 Hp can be found by just manipulating the Dyno and bike....Doc
Hello Doc, i have a question. do 2015 road glides need the true track engine stabilizers ? i really need to know
I don’t have a lot of experience with this product. Those that live for the curves in the mountains say yes. For us in the flat Low Country it’s a matter of choice not need….Doc
So do the screaming eagle plugs do good or is stock good enough? I have a stage 3 and 11:1 compression, cams heavy breather, Vance and Hines long shots and a upgrade to the computer from the dealer, power comander I think they called it. Thanks doc, see ya in February.
I was hoping this video gave you enough information to help make that decision. The SE plugs should last longer....Doc
@@LowCountryHarleyDavidson good thats, what I use. Thanks Doc.
Hey Doc, I have phat (orange) wires on my bike. I noticed the other day that my wires have a black smoke like residue on them. Is that a sign of something that I should be concerned about? Thanks !
YES. I am hoping it is road residue or maybe a possible oil leak around the rocker area. If your bike idles poorly you might have a break in the spark plug wire and you should replace....
Doc
I got a question Doc , Why are we paying extra for something that should come standard on all the bikes ?
so based off of this info, Doc, I have never been a fan of the cowbell and the horn located under it, so I relocated the horn on 2016 Street Glide, I then relocated the coil to that location, therefore the plug wires are much shorter. it looks amazing in my opinion. I have read that running shorter plug wire will interfere with how the motor runs, I ain't feeling it, but can you put my mind at ease?
Stock motor with air cleaner and exhaust? If so you are probably OK.
If motor work is at hand and you have a good rich tune probably OK
Wild motor work, with no tune? Ignition timing could be struggling,
Just a guess because Ion sensor is basing its data from less resistance....Doc
@@LowCountryHarleyDavidson stock motor with air cleaner, slip-ons, and a screamin eagle tuner. Thanks Doc
Doc, what is your thoughts on cryo plug upgrade on a twin cam and even on an M8?
I do not know what cryo plug is….Doc
@@LowCountryHarleyDavidson th-cam.com/video/Qas9Ht3K5jQ/w-d-xo.html
Cryogenic sparkplugs, nitrogen treated plugs
Hi Doc. I was wondering if my 2017 Harley softail slim S have 3 wires. I was told at the dealership that I only had the 2 wires on the left side. I’m planning on putting new ones on but wanted to make sure. My bike is already being worked on, due to other mechanical issues. But yeah if you can write back, that will be awesome. Thank you
Sir if your 2017 is a Twin Cam you only need 2...Doc
Very informative however the question I have with an 04 Carb twincam with low mileage stock ignition except for a SE module to go with the 203 cams "no big bore", should as a rule of thumb I replace the wires? What resistance should a stock wire than a performance wire have? Or if a stock wire is in need of replacement. I have no misfire issues
Front / Rear 20 inches Resistance (ohms) 5000-11666.....Doc
@@LowCountryHarleyDavidson thanks doc ... isn't that excessive?
👍
How about a video on a trike lock replacement for the trunk
Thanks for the suggestion,...Doc
?? For 1996 Road King. Back break, fluid level ok, have to pump 4-6 times b4 having breaks. Solution is ?? Thanks do enjoy all your videos.
New pads and check the thickness and trueness of your disc…..Doc
👍👍👍
Interesting.... So how many miles before you have to change your plug wires?
Change mine every oil change, 5k miles
That is a point we forgot to address. No specs from the Factory. A local electrician suggested to measure the ohm resistance on a brand new set installed and check every 10K. When there is a 10% difference...Replace...Doc
what about useing a accel stealth supercoil on a 2010 flhx
I have wondered the same question. No answer yet….Doc
so i wont mess up my ignition by changing to the screaming eagle plugs and wires on my 2011 superglide?
No…..Doc