ten components are shown in this Xj650 Maxim 1980 (a) Usa Oil Pump exploded diagram.
Some items from this specific schematic: Grommet, Gear Cover, O-ring (1j7), Bolt, Washer Based (4h7), Bolt, Hexagon Socket Head (4h7.
With a quantity of two pieces, the Bolt, Hexagon Socket Head (4h7 is the most used part in the OIL PUMP diagram.