First spark plug change
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Elite HDF Member
Joined: Jun 2006
Posts: 3,698
Likes: 10
From: Longview, Washington
First spark plug change
Changed my plugs for the first time at 12K. I was really curious to see how they looked. I can only say that they were perfect. Light tan and clean.
Running true duals and a SERT. AFR set at 13.8. MPG is 38 to 42.
Steve
Running true duals and a SERT. AFR set at 13.8. MPG is 38 to 42.
Steve
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Elite HDF Member
Joined: Jun 2006
Posts: 3,698
Likes: 10
From: Longview, Washington
I used stock HD plugs. The reason is that I've heard that after market plugs sometimes cause issues such as ECM error codes. Since the stock plugs looked so good, I stayed with them. BTW, my engine seems to run a little better and idle a little smoother. I attribute this to a more accurate gap. The old plugs were at around 43. I set the new plugs at 40.
Steve
Steve
Road Captain
Joined: Feb 2008
Posts: 597
Likes: 35
From: On the lake, Ohio
Checked mine the other day while performing 10,000 service. Light tan and clean also. Stock HD plugs that came with bike. Will probably change out next summer at 15,000 service (service manual states change @ 25,000mi) and stick with HD plugs.
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