Some items from this specific schematic: Bolt,flange,6x25, Washer,sealing,6., Cover Comp.,water, Clamp,water Hose.
The component with the lowest price in the OIL FILTER/WATER PUMP schematic is the Bolt,flange,6x12.
This Oil Filter/water Pump diagram displays the required parts for the Gl1500a Goldwing Aspencade 1992 (n) Belgium / Kph Oil Filter/water Pump.