Thread: Roadie Build
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Old 05-21-2010, 11:01 PM
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GearNut GearNut is offline
Motorized Bicycle Elite Member
Join Date: Aug 2009
Location: San Diego, Kaliforgnia
Posts: 5,106
Default Re: Roadie Build

As for your running problems, the idle speed screw (I think) for your carb should be initially set at 3 1/2 turns out from fully turned in. I don't have that particular one on my engine so I am a bit fuzzy on it.
The surging is caused by either the float height being set too high, or there is crud between the float needle valve and needle valve seat. This would also cause the fuel drip you observed.
There also is a slight chance that the float actually has a pinhole in it and it now has fuel inside the float, preventing it from floating properly.
It could also be a horrible air leak in the carb to manifold junction or manifold to cylinder junction. I would check for that after you check out the carb and if the carb check does not help.
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.

Does not come with a fortune cookie."

Last edited by GearNut; 05-21-2010 at 11:05 PM.
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