Question about 1982 Yamaha XJ 650

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Alot of smoke coming from exault when staring bike after closing throttle this disappeares IS THERE ANY WAY TO STOP THIS HAPPENING. Yamaha XS650.

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  • irene_burton May 09, 2009

    plugs right colour on normal run. when engine is warm and choke is off engine runs normal no smoke.

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Sounds like your air to fuel mixture is out of whack on your carb.

Posted on May 09, 2009

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Black smoke is running rich, normal up to a point on choke, white/gray smoke is burning oil, not good. if mostly happens on start up then might be just valve guide seals, oil tends to drain past them when engine not running. white smoke under load is rings/bore shot, black smoke running rich.

Posted on May 10, 2009

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