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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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detonation, ignition, noise, performance, pinging

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  #11  
Old 22nd July 2013
benton benton is offline
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Join Date: May 2005
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Sportster/Buell Model: Sportster Delux 883/1200
Sportster/Buell Year: 1988
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If your idle is changing while just sitting then it's probably the ignition or coil.
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  #12  
Old 22nd July 2013
groovemeisterus's Avatar
groovemeisterus groovemeisterus is offline
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Quote:
Originally Posted by benton View Post
If your idle is changing while just sitting then it's probably the ignition or coil.
The idle has already changed by the time i come to a stop. Then i re-adjust. While riding, has to get to 200 degrees, then it auto changes, but can't tell till come to a stop so can idle from tach.

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  #13  
Old 23rd July 2013
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Got me some NKG 8's as suggested above.

Here is a pict of my old plugs. Not sure shows detonation, but i'm no plug reading expert. Any input? I'll post in plug related forumn also.

Any opinoins on what this plug is saying from reading my symptoms?

[IMG][/IMG]

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  #14  
Old 23rd July 2013
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Posted what I think was problem in new thread. Carbon HOT spot pre-ignition.
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