Read these plugs?
Ultimate HDF Member
Joined: Mar 2008
Posts: 7,604
Likes: 38
From: Landrum, SC , elevation 986'
Like said before.....your a bit lean. 
This site will help you tune your carb and give you some tips and tricks.
Harley Davidson Performance Tech Tips
This site will help you tune your carb and give you some tips and tricks.
Harley Davidson Performance Tech Tips
Seasoned HDF Member
Joined: Nov 2009
Posts: 15,705
Likes: 22,720
From: Farmington ,MS
They look great, the base ring should look like chocolate milk, watch this video Most people read plugs wrong. (Not any of you guys of course) The ring around the base is where you look at jetting and nowhere else, not the ground strap or the porcelin, they indicate heat range and detonation respectively.
That video is for reading new plugs that have made one pass on the dragstrip, car turned off and towed back to the pits...none of that information is valid for plugs that have been driven for miles of the street. They showed a plug that was too rich with a bone white porcelain...a street driven plug the whole plug would be turning black...for example.
Tourer
Joined: Jun 2010
Posts: 496
Likes: 1
From: Eastern Ontario , Canada
Your plugs DO look slightly lean , but the more telling part is that you said you get "pops" on deceleration . That is a definate sign of running a bit lean . As some other have said , I would say one size up on your jet .
Outstanding HDF Member
Joined: Aug 2010
Posts: 3,486
Likes: 6
From: Union,Ms
No, dickweed, I pulled the plugs at the parts store three weeks ago, put them in my saddle bags and took the pics tonight. The whole "I might have been drinking" was tongue-in-cheek. Yes, I was drinking (TONIGHT) when I took the pics. Anyone that can interrogate EXIF data can confirm that.
You are easily the biggest ****ing douche on this forum.
You are easily the biggest ****ing douche on this forum.
Seasoned HDF Member
Joined: Sep 2007
Posts: 9,208
Likes: 374
From: Central Illinois, Between I-80 and I-74
Just a tad lean, but about as close as you'll get with a carb. You can change the jet, see if it helps with the pop. You'll probably end up a tad rich.
Did you shut the bike down when running down the road, or just pull the plugs after you cruised into the parking lot?
Did you shut the bike down when running down the road, or just pull the plugs after you cruised into the parking lot?
Road Master
Joined: Feb 2010
Posts: 1,210
Likes: 1
From: LI, NY
The problem is guys have to stop using old spark plug posters and auto text books from 1960 to identify SP condition.
For a EFI system their good.
For a EFI system their good.
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According to this site, they appear to be close to the #20 or #21, which is #20 is good, and #21 is kinda hot, but ok.
Me personally I would not change anything. When we were racing dirt track cars we wanted them a little whiter or leaner, but leaner means more horse power until you get too far and start melting the pistons anyway.
Me personally I would not change anything. When we were racing dirt track cars we wanted them a little whiter or leaner, but leaner means more horse power until you get too far and start melting the pistons anyway.
Banned
Joined: Jul 2008
Posts: 1,036
Likes: 67
No, dickweed, I pulled the plugs at the parts store three weeks ago, put them in my saddle bags and took the pics tonight. The whole "I might have been drinking" was tongue-in-cheek. Yes, I was drinking (TONIGHT) when I took the pics. Anyone that can interrogate EXIF data can confirm that.
You are easily the biggest ****ing douche on this forum.
You are easily the biggest ****ing douche on this forum.