1976 Honda CB550F Front Master Cylinder Parts

Its application is the 1975–76 CB550F original-style unit and reference 45530-377-305. A universal or aftermarket assembly may have different internals. Identify that cylinder’s manufacturer, model and bore and obtain its matching service kit.

They have different piston sizes and should not be selected interchangeably by appearance. Confirm the appropriate hydraulic specification for the installed brake system before choosing an assembly, particularly if the caliper or front end has changed.

The featured round thread-on cap comes with a diaphragm, references 43513-MJ6-006 and 45520-300-000. The reproduction cap referenced 45513-341-771 comes with a plastic O-ring. Compare the cap type and supplied pieces with the reservoir being repaired.