FUEL SYSTEM HONDA V45 Remove the air chamber top cover. Remove the bolt attaching the thermostat housing to the air chamber and the ground cable. Remove the thermostat housing and coolant hoses. Remove the temperature sensor wire. Disconnect the breather tube and loosen the carburetor bands. Remove all the No. 1 and No. 3 carburetor intake pipe bands. Loosen the No. 2 and No. 4 carburetor intake pipe bands, on the carburetor side only. Remove the carburetor assembly from the intake pipes. Remove the No. 1 and No. 3 intake pipes from the cylinder head. Remove the carburetor choke clamp and disconnect the choke and throttle cables. Remove the carburetor assembly from the right side. NOTE: It may be necessary to loosen the engine mount bolts and move the engine on its rubber mounts to provide clearance for carburetor removal. VACUUM CHAMBER REMOVAL Remove the four vacuum chamber cover screws and cover. CAUTION Do not interchange vacuum chamber covers, springs pistons or jet needles between carburetors. AIR CHAMBER TOP COVER BOLT GROUND CABLE SCREWS COVER COMPRESSION SPRING Remove the compression spring, diaphragm and vacuum piston. Inspect the vacuum piston for wear, nicks, scratches or other damage. Make sure the piston moves up and down freely in the chamber. Note that the No. 1 and No. 3 carburetors use thinner jet needles and shorter springs than the No. 2 and No. 4 carburetors (SABRE only). DIAPHRAGM VACUUM PISTON 54 Date of Issue: October, 1982 © HONDA MOTOR CO., LTD. 4-6