The most reasonably priced component used on the Tzr125 1991 3pc3 England 213pc-310e1 Front Master Cylinder is the Bolt(30w).
The Front Master Cylinder assembly is constructed from several parts from which the Cylinder Kit, Master is the most expensive.
Parts such as the Front Master Cylinder: Bolt(30w), B0lt, Uni0n (31a), Diaphragm, Reservoir, Holder, Brake Hose are included in the Tzr125 1991 3pc3 England 213pc-310e1 Front Master Cylinder parts fiche.