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home Fix label Vehicles label_important Motorcycles

spark plug ?

does any one know what a black spark plug on a derestricted bike means? thanks
lewis, July 2009
home Fix label Vehicles label_important Motorcyclesdone
It means a rich mixture - either the main jet is slightly too large or the air filter may be a little dirty. Ideally you are looking for a tan or mid brown colour.

John, July 2009

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