1977 Honda CB550F Supersport — Maîtres-cylindres et pièces de réfection

The featured 1977 kit references 45530-404-315 and has its own exact application. Select it by the fitted master cylinder and confirmed rebuild reference; do not carry the earlier model’s kit choice forward solely because the motorcycle is a CB550F.

Its piston is 14 mm, but a converted caliper can have different hydraulic requirements. Compare the caliper specification, hose connection, lever geometry and brake-light arrangement before choosing the master. A model listing alone does not establish a conversion’s compatibility.

The round thread-on cap comes with a diaphragm referencing 45520-300-000. A separate diaphragm is useful when keeping a compatible existing cap. Compare the cap and reservoir design first so you order the needed repair piece without duplicating it.