Spark plugs?
Ultimate HDF Member
Joined: Dec 2008
Posts: 5,120
Likes: 17
From: Indiana
I run the E3 Diamond fire and it's pretty much a standard spark plug but the ground electrode is not just l-shaped. go to the E3 website for a better explanation. I noticed smoother idle and quicker, smoother throttle response. I run them in all my vehicles and I like them and they are only 5 bucks a plug. For the TC they are part number E3.36 at the auto parts store or online.
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Cruiser
Joined: Apr 2009
Posts: 168
Likes: 0
From: Maine
Several replies for "stock", since my bike was bought used what is stock, Size-Brand? I am not looking for big upgrades been there tried that. I run Champions in my sportster. My bike is FI.
Ultimate HDF Member
Joined: Dec 2008
Posts: 5,120
Likes: 17
From: Indiana
If I remember right stock Harley plugs are champion. Number Harley Davidson 6R12. I got this off my old plugs and looking at them they are black and were only on my bike for 700 miles. My E3's been on for almost 4k miles and they are still clean!! Not white and not black!! There's not even that black residual on the threads!!
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jacknthebox
Touring Models
43
Apr 2, 2012 08:43 PM
