my 80cc gasbike is bogging down when I open the throttle all the way. My engine has roughly 2K mls. on it. Engine compression seems okay, I put a new gasket on intake manifold, no improvement. My float valve pintle has a groove worn on it from seating in the float valve seat, could that cause bogging? Does the inner diameter of the fuel line affect this? Could to much oil in gas cause this. The problem goes away when I close the gastank valve, until I run all the fuel out of the line.