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Old 22-08-24, 12:30
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Mike K Mike K is offline
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Hi Darryl

The popping in the exhaust, it might be that some unburnt fuel is being ignited in the exhaust manifold.

You could try fitting a smaller sized main jet in the carby. I don't think the rich running and black spark plugs will be caused by the idle circuit- it might be a high float level or a sticking float causing it to run rich.
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