Master Cylinder Reservoir Cap with Diaphragm, Round OEM Thread on type.
Reservoir Cap OEM # 43513-MJ6-006 /Diaphragm OEM # 45520-300-000

Fits: Honda Front Master Cylinder on CB750K (1969-78)
CB750F (1975-78) Supersport,
CB750A (1976-78) Hondamatic

Also Fits Rear Master Cylinder on CB750F (1975-78) Supersport

Fits: Honda Rear Master Cylinder on CB750F (1979-82)

Fits: Honda Master Cylinder on CB900C (1980-82) Custom,
CB900F (1981-82) Supersport,
CB1000C (1983) Custom,
CB1100F (1983) Supersport

Fits: Honda Front Master Cylinder on CB500K (1971-73),
CB500T (1975-76),
CB550F (1975-77) Supersport,
CB550K (1974-78)

Fits: Honda CB400A (1978),
CB400TII (1978),
CB450K (1970-74)

Fits: Honda Front Master Cylinder on CB350F (1972-74) Supersport,
CB400F (1975-77) Supersport

Fits: Honda CB350G (1973),
CB360K (1974),
CB360G (1974),
CB360T (1975-76)

Part Number: 29-0080