The Bolt (4r8) is the most widely applied product in the TZR250 1987 2MA ENGLAND 272MA-310E1 WATERPUMP ( two times ).
Some items from this specific schematic: Impeller Shaft Assy, Washer, Plate (3l7), Bolt (4r8), Washer Plate (3l6).
The sub assemblies and components that make up this Waterpump include this Gear, Impeller Shaft, the most expensive part.