A sample from the products for the Oil Pump include: Shim(10x18x0.5), Pump Assy,engine Oil, O Ring(d:2.4,id:73), Nut.
The Pin(4x15.8) is the lowest priced item on this Oil Pump schematic.
The twenty Gz250 Marauder 2003 (k3) Usa (e03) Oil Pump component parts are all listed in this schematic.