5. FUEL SYSTEM ATV 50 AUTO BYSTARTER INSTALLATION Screws Auto Bystarter Install the auto bystarter into the carburetor body until it bottoms.. Install the set plate and then tighten the two screws. Set Plate FLOAT/FLOAT VALVE/JETS FLOAT CHAMBER Remove the two float chamber screws and the float chamber. Screws Float Pin O-ring Remove the screw and O-ring. Remove the float pin, float and float valve. Float 5-8