5. FUEL SYSTEM AGILITY CITY 125 AIR CUT-OFF VALVE Screws DISASSEMBLY Remove the two screws attaching the air cut-off valve. Remove the spring and vacuum diaphragm. Check the vacuum diaphragm for cracks or damage and check each passage for clogging. Air Cut-off Valve Cover ASSEMBLY Install the vacuum diaphragm onto the carburetor. Install the spring and air cut-off valve cover. Install the throttle cable set plate and tighten the two screws. · Be sure to set the vacuum diaphragm lip into the groove on the carburetor. · When installing the air cut-off valve cover, make sure that the vacuum diaphragm is properly installed. Diaphragm Spring Cover Screws VACUUM CHAMBER DISASSEMBLY Remove the two vacuum chamber cover screws and the cover. Vacuum Chamber Cover Spring Vacuum Diaphragm/Piston Remove the spring and vacuum diaphragm/ piston. 5-6