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hi folks , i have a problem with my atlas engined p11 , she keeps fouling the left hand plug ( sooty to the extent that plug packs up ) I'm running amal premiers, brand new ones and have swopped over all components in the carbs , so don't think its the problem, cylinder head cracked ?, valve guides letting oil through ? i would expect the plugs to be oily not sooty ?
the bike starts/runs fine ,no flat spots pulls nice in all gears .
any ideas suggestions please ?
andy
