twenty-two components are shown in this Dr600r 1988 (j) (e02 E04 E06 E15 E16 E17 E18 E22 E24 E25 E34 E53 Oil Pump exploded diagram.
Of all the components used in this assembly the Pump Assy,engine Oil is the most expensive.
The component with the lowest price in the OIL PUMP schematic is the Screw 5x12.