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Rolf1976_KZ900
hi Rolf, I'm from Sweden.
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Warren3200gt
I think I just looked at what spark plug was in the engine when I bought a new one, in my doc it says B7ES.
I'll buy a B7ES and check what happens
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Scirocco
ok, I'll check the valve clearence, but wouldn't you here if the clearence is to small (valves not closing) when you pull of the gas handle?
I guess it could also be piston rings, but it doesn't smoke black.