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    1987 Yamha Pro v 150 crank case check valve

    I have an issue where the motor runs a little rough on idle, but at higher rpms/throttle it runs fine. It also smokes a lot. Also, I see slight oil bleed from the carb main jet gaskets and drain screw gaskets. This makes me wonder if I have a crank case check valve issue. The motor sometimes...
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    Yamaha Pro V 2 stroke carb needs throttle during warm starts.

    I have a curious issue that I'm not even sure is an issue. This is my first motor. My Yamaha Pro V cold starts fine. I do the standard start procedure, sometimes it needs two cranks. When the engine is warm, when I turn it off, wait a little bit, maybe a minute, then turn the key, it starts...
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    Rev spike when starting up

    This is probably a stupid question. I have a 1987 2 stroke Yamaha Pro V 150. I recently had to adjust the timing within spec to fix what the previous owner did. It seems to idle better, but I notice that when I turn the key to start it up, the revs jump up really quick, before quickly settling...
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