On this parts fiche the Pipe,water Inlet is the most specified component.
fifteen components are shown in this Gl1500a Goldwing Aspencade 1996 (t) Spain / Kph Water Pump exploded diagram.
The most reasonably priced component used on the Gl1500a Goldwing Aspencade 1996 (t) Spain / Kph Water Pump is the Bolt,flange,6x12.