Honda-SOHC
SOHC.co.uk Forums => CB500/550 => Topic started by: alan on September 12, 2021, 05:26:56 PM
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On my 1972 Honda CB500 K1 I've noticed my spark plugs seem a little sooty and the electrod insulation is not quite the light tan/grey colour that it should be, I screwed the pilot screw out to the workshop manual setting and it does seem a little heavy on fuel, any ideas of the best solution to weakening the mixture?
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Are all the plugs the same?
Try new air cleaners,
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