The most reasonably priced component used on the Gl1100 Goldwing 1981 (b) Usa Oil Pump is the Screw,flat,5x12.
The sub assemblies and components that make up this Oil Pump include this Pump Assy., Oil, the most expensive part.
Some items from this specific schematic: Clutch,oil Pump, Bolt Flange 6x18, Washer, Drum, Valve, Relief.