1973 Honda CB450K Internal Master Repairs, Cap Seals & Universal Units

The listing names 45530-377-305 and its motorcycle applications but provides no detailed component list. Identify the retained master and confirm that required piece before ordering. Do not extend the kit to a universal replacement solely because both appear in the same repair category.

A separate diaphragm referencing 45520-300-000 can overlap that named component in the round cap package. The other cap lists a plastic O-ring without a diaphragm itemized. Compare contents and the retained reservoir before selecting individual seals for the same repair.

The boot references 45522-300-010 and is described where the brake hose joins the master. The diaphragm and cap O-ring concern the reservoir. Identify the location needing repair and check included contents separately; the internal kit does not itemize boot coverage.