5. FUEL SYSTEM ATV 50 FLOAT CHAMBER ASSEMBLY Main Jet Needle Jet holder Install the main jet and needle jet holder. Install the air screw and throttle stop screw according to the rotations recorded. If the air screw must be replaced, be sure to perform the air screw adjustment again. Throttle Stop Screw Air Screw Float Pin Install the float valve, float and float pin. Tighten the float screw securely. FLOAT LEVEL INSPECTION Slightly tilt the carburetor and measure the float level with the float valve just connecting the float arm. Float Level: 8.6 mm (0.34 in) Replace the float if the level is out of the specified level range. Install the O-ring. Check the operation of the float and install the float chamber. Tighten the screws. 5-10