Yamaha - Float valve assy - YF1-36264-48-40Yamaha Float Valve Assembly Carburetor Fuel Control YF1 36264 48 40 Overview If youve ever dealt with a carb thats flooding or starving for fuel, theres a good chance the float valve was the culprit. Ive replaced a lot of these on Yamahas where the engine just wouldnt idle right or kept loading up with fuel. The Yamaha Float Valve Assembly YF1 36264 48 40 helps regulate fuel inside the carb so it stays balanced and predictable. When its working right,