The lowest price component in this Oil Pump parts-list fiche is the Screw, Flat.
The Pin, Dowel(4dh) is the most widely applied product in the XN150 TEO'S 2002 5PR3 ITALY 1A5PR-300E1 OIL PUMP ( two times ).
The Yamaha OIL PUMP has eleven products enlisted in the schematic.