thirty-nine components are shown in this Gb500 Touristtrophy 1989 (k) Usa California Oil Pump exploded diagram.
A sample from the products for the Oil Pump include: Rotor A,pump Out., Orifice,5.5mm, O-ring,7x1.7, Pin,c0tter 30x45.
With a quantity of two pieces, the O-ring,7x1.7 is the most used part in the OIL PUMP diagram.