Spark plugs
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Road Master
Joined: Jul 2008
Posts: 948
Likes: 1
From: Worth, Illinois
Spark plugs
OK just to see I changed my plugs yesterday and did the oil change as I do every year, and the plugs are are dark. Now the bike runs fine but just curious as to normal wear should look like from plugs that are used.
Tourer
Joined: Nov 2007
Posts: 491
Likes: 5
From:
I don't know..they look ok to me...kind of hard to tell from the pics though... how often do you change them?? You said "every year" oil change...how many miles is that? I change my plugs every 5k just like the oil.... so about 2x a year.... at 5k they are just beginning to show some coloring....
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Road Master
Joined: Jul 2008
Posts: 948
Likes: 1
From: Worth, Illinois
I change them every year and considering I only have had this bike for just over a year, I put on about 2,500 miles last year. I don't think anything is for cause of concern, but figured I'd ask all the experts here.
Road Captain
Joined: Jul 2007
Posts: 564
Likes: 0
From: East Stroudsburg PA
I read on this site in another thread a little while back and it had this web page to use as a reference for spark plugs...Maybe try this out, here is the link
http://www.dansmc.com/Spark_Plugs/Sp...s_catalog.html
http://www.dansmc.com/Spark_Plugs/Sp...s_catalog.html
Ultimate HDF Member
Joined: Jul 2006
Posts: 9,335
Likes: 13
From: MA
I change my plugs every 10k miles per the service manual. My understanding is if you're not running too lean or too rich your plugs should have a light tan color to them. That's what mine look like when I replace them.
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Road Master
Joined: Mar 2009
Posts: 930
Likes: 0
From: Northwest WI
A nice medium chocolate brown on the plugs is what I've been told is the proper fuel mixture. Black is too much fuel and white you are running too lean of a mixture.
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Ultimate HDF Member
Joined: Nov 2007
Posts: 6,975
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From: NJ
My manual calls for changing them at 20k so still have the originals. Don't plan on doing it before. I have pulled them a few times to check them and they've always been blacker than yours. I take it as a good sign that my bike isn't running lean.
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