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Old 10-19-2012, 06:20 AM
Bikeguy Joe Bikeguy Joe is offline
Godfather of Motorized Bicycles
Join Date: Jan 2008
Location: up north now
Posts: 11,531
Default Re: Need help with repair

If the piston doesn't move when the back wheel does, it's more likely a clutch problem or a sheared pin.

You want to mix the gas at between 24 to 1 (break in) or more like 40 to 1 for normal running. You'd better fire you "bike guy" if he fixed the throttle, but couldn't figure out the real problem.
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