5. FUEL SYSTEM UXV 500 CARBURETOR DISASSEMBLY/INSPECTION/ ASSEMBLY DISASSEMBLY Remove the carburetor . Loosen the drain screw to drain the gasoline from the float chamber. · Keep sparks and flames away from the Fuel Drain Plug work area. · Drain gasoline into a clean container. · Do not loosen or tighten the painted bolts and screws of the carburetor. Loosening or tightening them can cause throttle and piston valve synchronization failure. Remove the four screws and top cap . Top Cap Spring Remove the spring and piston valve. Piston Valve 5-7