The Washer, Plate(481) is the most widely applied product in the TZR125 1992 3PB4 EUROPE 223PB-300E1 REAR MASTER CYLINDER ( three times ).
Some items from this specific schematic: Screw, Pan Head(3bc), Tank, Reservoir, Washer(526), Clip, Pipe 1.
The lowest price component in this Rear Master Cylinder parts-list fiche is the Bolt, Flange(2vm).