Posted January 27, 201510 yr What you guys make of this plug..looking bit black? Bike has a serious midrange miss and backfiring when rolling off throttle.(sorry for crap pic)
January 27, 201510 yr Does look a bit sooty Mc, to rich I would say or perhaps not enough air in the mix tho the spark terminals look ok as in light brown rather than black.
January 28, 201510 yr Does that model of bike have a mechanical or electronic advance/ retard mechanism ?
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