The Roller,3x12.8 is the most widely applied product in the MTX125RW 1983 (D) SWEDEN SHIFT DRUM/SHIFT FORK ( five times ).
The Washer,12mm is the lowest priced item on this Shift Drum/shift Fork schematic.
The Shift Drum/shift Fork is made up of components including this Drum,gearshift which is the most expensive.