The most reasonably priced component used on the Gl1500 Goldwing 1990 (l) Australia Water Pipe/thermostat (gl1500l/am/sem) is the Bolt,flange,6x14.
Some items from this specific schematic: Tube C,water, Case Comp,thermos, Joint A,3way, Joint,4 Way.
This Sub Harness,eng is the most expensive of the items that make up this Water Pipe/thermostat (gl1500l/am/sem) assembly.