What plug color should I be looking for?
Thread Starter
|
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
What plug color should I be looking for?
I know you used to want a light tan on the plug but I remember someone saying that with the ethanol gas you are now looking for a whitish color.
I recently re-jetted my bike and have a slightly off white color on the plugs but no backfiring on decel. The bike runs great but I am concerned about running too lean.
What exactly does running lean do to the motor?
I recently re-jetted my bike and have a slightly off white color on the plugs but no backfiring on decel. The bike runs great but I am concerned about running too lean.
What exactly does running lean do to the motor?
Stellar HDF Member
Joined: May 2009
Posts: 2,856
Likes: 127
From: Middle of Kansas
As long as your plugs are not blistered around the center electrode you are probably not to lean. A lean engine will run hotter, and possibly detonate quicker. Sounds like yours are pretty good. Not popping on decel is a good sign that it is not to lean, at least on the pilot jet.
Banned
Joined: Jul 2010
Posts: 853
Likes: 19
From: Melbourne
Try this website...I found the info very good
http://www.4secondsflat.com/Spark_plug_reading.html
Cheer
http://www.4secondsflat.com/Spark_plug_reading.html
Cheer
Trending Topics
Road Master
Joined: Oct 2011
Posts: 957
Likes: 2
From: Carlsbad Springs Ontario
Sounds like your ok but being Canadian and not using corn fuel , i cant be sure.
Best advise is to keep checking plug condition . If they look as new without any previously descibed nasties , you should be good to go .
If you suspect you are running lean , your motor will run hot and plugs will show a glazed polished look . Suggest you web search for a simple spark plug diagnostic pic.
Best advise is to keep checking plug condition . If they look as new without any previously descibed nasties , you should be good to go .
If you suspect you are running lean , your motor will run hot and plugs will show a glazed polished look . Suggest you web search for a simple spark plug diagnostic pic.
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
Thread
Thread Starter
Forum
Replies
Last Post
Micheletti
Sportster Models
10
May 4, 2009 10:49 AM