View Single Post
Old 01-16-2010, 10:17 PM
GearNut's Avatar
GearNut GearNut is offline
Motorized Bicycle Elite Member
Join Date: Aug 2009
Location: San Diego, Kaliforgnia
Posts: 5,106
Default Re: losing power at high rpm

I can only surmise that it was not too lean. Limiting the gas flow at the fuel valve basically creates a situation where the fuel valve is now the main jet. If the carb cannot get the fuel flow enough to fill the float bowl and let the float and float valve/ needle do it's job then ultimately the fuel valve is used as the regulator instead of the jet.
I hope that makes sense.
Reply With Quote