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Canadian Daves JustKDX
top end questions
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[QUOTE="jaguar, post: 650851, member: 19340"] Mine is like that too. I just clean it up with sandpaper and keep going. I think mine did it from riding it hard without letting it warm up enough. Black carbon buildup on the pipston is from a too rich mixture from the carb. Try one size smaller main jet and then look at the piston after a few rides. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
top end questions
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