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Old 12-22-2008, 12:58 PM
Airbuzz Airbuzz is offline
Motorized Bicycle Member
Join Date: Aug 2008
Posts: 49
Default Re: Topping out at 20 mph...Too much fuel ?

I'll perform all of your suggestions tonight and report back.

I'm intrigued most by how the fuel level in the bowl would cause my top speed bogging. I can't understand why this would have an effect (admittedly I don't know very much about carbs) but I did notice some fuel showing up on top of the engine possibly spilling out thru the airfilter housing. Maybe at full throttle when the bowl fuel level is lowered to a certain point, the release of fuel from the float fuel metering pin goes from a little stream to a flood, then the bowl is over full, and it spills out the air filter housing, the fuel filter being saturated increases the fuel-air mixture and also restricts airflow...hence the bogging. Huh...maybe this is it. I'll check it out.
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