Can some one tell me what on average is the life of a spark plug nowadays. Particularly in a big bore, multi cylinder engine for touring? (not commuting)
Also what in your opinion is the best make of plug to screw into the head. regardless of price, and why? (touring)
Last one: What would one have to pay for say a middle to upper range Spark plug for a multi cylinder engine? (touring)
cheers all
Huck
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