4. FUEL SYSTEM ZING125 Adjusting Nut Lock Nut Install the throttle valve into the carburetor body. Align the groove in the throttle valve with the throttle stop screw on the carburetor body. Connect the throttle cable. Throttle Cable Tighten the carburetor cap. Inspect the throttle grip free play and adjust if necessary. Throttle Grip Free Play: 26mm Accelerating Pump Arm A.C.V. AIR CUT-OFF VALVE (A.C.V.) REMOVAL Disconnect the tubes that go to the air cut-off valve. Remove the two attaching screws. Remove the air cut-off valve. Screws Check A.C.V. Screws Valve Body O-ring DISASSEMBLY Remove the two attaching screws to remove the air cut-off valve cover. Remove the spring and diaphragm. Cover Diaphragm Spring Cover 4-9