4. FUEL SYSTEM ZING125 Groove Check Valve INSPECTION Inspect the check valve for proper operation. Inspect the air cut-off valve diaphragm and O-ring for deterioration or damage. Replace with new ones if necessary. Clean each air passage with compressed air. O-ring Diaphragm INSTALLATION First install the diaphragm and O-ring onto the air cut-off valve body and then install the spring and cover. Tighten the screws. Torque: 0.30.4 kg-m Install the diaphragm by aligning it with the groove on the air cut-off valve to avoid damage and air leaks. Connect the tubes that go to the air cut-off valve. FUEL TANK FUEL TANK REMOVAL Warning · Keep sparks and flames away from the work area. · Wipe off any spilled gasoline. Remove the right and left side covers and the right and left decorative covers under the fuel tank. Remove the four bolts attaching the rear carrier. Remove the two seat lock bolts. Auto Fuel Valve Remove the auto fuel valve. Disconnect the fuel tube and remove the bolt on the end of the fuel tank. Disconnect the fuel unit wire connector and fuel gauge wire. Remove the fuel tank. FUEL TANK INSTALLATION Install the fuel tank in the reverse order of removal. Check that there is no fuel leakage. Check the wire connectors for proper connection. Fuel Unit Wire Connector 4-10