Plugs and wires
Road Warrior
Joined: Dec 2010
Posts: 1,629
Likes: 46
From: East Hartford, CT
Best to stick with stock plugs
I use 8.8mm drag specialties wires. No problem with the wires.
You need to keep the resistance near or at same as stock for the antiknock to work properly.
I use 8.8mm drag specialties wires. No problem with the wires.
You need to keep the resistance near or at same as stock for the antiknock to work properly.
Stellar HDF Member
Joined: Aug 2012
Posts: 2,664
Likes: 184
From: Indiana, USA
Your engine management and ignition system were designed as a package. Stock wires are just as good as anything you can buy. SE plugs are usually suggested for high compresssion applications so if you are stock compression ratio save some bucks and stay stock. other than that you may enhance burn time of the plug with an SE ignition coil. Basically the same coil, a little different turn ratio with a longer secondary winding resulting in a hotter spark that burns longer.
Outstanding HDF Member
Joined: Aug 2011
Posts: 2,325
Likes: 7
From: SE Illinois
Additionally as someone else said, changing plugs and/or wires to something different will affect how the anti-knock function works, so it could actually hurt performance.
Trending Topics
Tourer
Joined: Sep 2011
Posts: 329
Likes: 2
From: Honolulu, HI
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Ultimate HDF Member
Joined: Apr 2010
Posts: 7,138
Likes: 26
From: Southern Oregon
Ditto... I'm running some SE plugs and dont notice any difference whatsoever...
pulstar Pulse Plugs
If you are interested in plugs that will make a difference in engine performance... please take a look at my website: http://WWW.Pulstar-IncognitoProducts.com
Pulstar Pulse Plugs have a 30-day money back guarantee... to out perform your current spark-plugs. There is also a 2-year warranty as well. They add performance to your engine that you will feel... in 30-days or you get your money back. Several HD Forum members are using them with great results. And they will not have a negative effect on the HD anti-knock function or how it works. Unlock your engines true potential with Pulstar Pulse Plugs. Thanks for your time... ride safe.
Pulstar Pulse Plugs have a 30-day money back guarantee... to out perform your current spark-plugs. There is also a 2-year warranty as well. They add performance to your engine that you will feel... in 30-days or you get your money back. Several HD Forum members are using them with great results. And they will not have a negative effect on the HD anti-knock function or how it works. Unlock your engines true potential with Pulstar Pulse Plugs. Thanks for your time... ride safe.
Last edited by IncognitoProducts; Jan 3, 2013 at 05:44 PM.