The Xg250 2005 4d61 France 1d4d6-332g1 Oil Pump consists of nineteen pieces with the Oil Pump Assy being the most expensive.
Some items from this specific schematic: Pipe, Delivery 1, Gasket (5r6) (nas), O-ring (583 Oil Drain Bolt), Bolt.
On this parts fiche the Screw is the most specified component.