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my yamaha yn50 wont start?

put a new piston in my bike and now it wont start. i am trying to start it without the airfilter on could this be the reason

john thompson
December 2007

Yamaha Vehicles, Motorcycles Start Piston Bike

was it a standard piston?

make sure you still have compresssion ,

if youve only changed the piston , cant really see what else it could be other than distubance in the cylinder head and compression loss

did yo renew the gaskets or just re-use the old ones?

jase
January 2008

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