5. FUEL SYSTEM PEOPLE 125/150 Vacuum Diaphragm/Piston Push the needle holder in and turn it left to Install remove the needle holder. Remove the spring and jet needle from the piston. Be careful not to damage the vacuum diaphragm. Remove Jet Needle INSPECTION Inspect the needle for stepped wear. Inspect the vacuum piston for wear or damage. Inspect the diaphragm for deterioration and tears. Vacuum Diaphragm Vacuum Chamber Cover ASSEMBLY Install the vacuum piston/diaphragm in the carburetor body and align the tab on the diaphragm with the groove in the carburetor body. Install the spring. Install the vacuum chamber cover and tighten it with the two screws. · Be careful not to damage the diaphragm. · Hold the vacuum piston while tightening the vacuum chamber cover. Vacuum Diaphragm Float Chamber FLOAT CHAMBER DISASSEMBLY Remove the four float chamber screws and the float chamber. 5-7