The O-ring 7mm is the most widely applied product in the GL1500 GOLDWING 1990 (L) ITALY / KPH AIR DISTRIBUTOR ( six times ).
The Spring,valve is the cheapest item from this partsfiche.
This schematic depicts all components used in the Gl1500 Goldwing 1990 (l) Italy / Kph Air Distributor partslist.