1972 Honda CB750K — Trousses de réfection, pistons et vis de purge d’étrier

The featured rebuild kit does not list a piston. It lists the sealing ring, bolts, bleeder pieces and adjuster set. The piston has its own product listing, so compare its application and your existing part before adding it.

Its listing includes both caliper body sides, pads, piston, piston seal, piston cap, bleed screw and cap, bolts and clip. Read the full description against your repair list; hose and master cylinder parts are separate product choices.

Identify the caliper itself before ordering for a converted front end. The separate piston references 45107-300-003 and measures 38.15 mm × 34 mm; a motorcycle-year match alone does not establish the internals of an aftermarket caliper.