engine bad sound problem

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Yamaha Motorcycle

Repair guides and support for motorcycles manufactured by Yamaha Motor Company.

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bill @ruggb 声誉积分: 7.4千 5 5 1 · Answer 1 · 2026-06-14T07:46:21-07:00

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it almost sounds like an electrical spark discharge, but the engine seems to be running without hesitation.

My other thought would be the piston hitting a valve - that would be rather serious.

I can't think of anything else to cause that noise.

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