Carb Pump Diaphragm for Keihin Carbs – Replaces OEM #’s 16021-393-004 / 16021-393-014 / 16021-MC9-771
Kits contain: 1 Diaphragm with Rod and 1 Bellow Rubber

Fits: Honda CB750K (1977-78),
CB750F (1977-78) Supersport,
CB750A (1976-78) Hondamatic

Fits: Honda CB650 (1979/1981-82) – Only fits if bike requires a 89mm end to end pinCB650C (1981) Custom – Only fits if bike requires a 89mm end to end pin

CB650SC (1982) Nighthawk – Only fits if bike requires a 89mm end to end pin

Check the pin length on your old carb pump diaphragm before ordering

Fits: Honda CB450SC (1983/1985-86) Nighthawk