The component with the lowest price in the 05 OIL PUMP schematic is the Pin, Dowel.
On this parts fiche the Clip is the most specified component.
Parts such as the 05 Oil Pump: Holder, Oil Pipe, Seal, Crankcase, Circlip (4l0), Oil Pump Assy are included in the Tzr50 2012 2as1 Europe 1l2as-300e2 05 Oil Pump parts fiche.