12. CARBURETOR VITALITY 50 Remove the compression spring and Vacuum Piston Spring vacuum piston. Vacuum Piston Remove the needle holder, spring and jet needle from the piston. · Be careful not to damage the vacuum piston diaphragm. VACUUM PISTON INSPECTION Inspect the vacuum piston and jet needle for wear or damage. Inspect the diaphragm for deterioration and tears. Needle Holder Jet Needle Screw FLOAT CHAMBER DISASSEMBLY Remove the three float chamber screws and the float chamber. Float Chamber 12-17