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Old 12-26-2011, 06:53 AM
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Cavi Mike Cavi Mike is offline
Motorized Bicycle Elite Member
Join Date: Dec 2011
Location: Rochester, NY
Posts: 189
Default Re: Second Build, vibrating?

If it's sputtering up top it's doing what's called "4-stroking" because it's running too rich. You need to adjust the needle on the slide in the carb. The needle is held in place with an e-clip and there are 3 positions.

Where did you get your engine? I've been trying to find that exact engine, 66/80cc slant-head in black but everyone says they're discontinued, all I can find are silver ones.
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