sixteen components are listed in the schematic for this Gl1500se Goldwing Special Edition 1993 (p) Singapore / Cl Kph Air Distributor .
On this parts fiche the O-ring 7mm is the most specified component.
A sample from the products for the Air Distributor include: Ball,steel 10, Mount,air Sensor, O-ring 7mm, Screw-wash.,5x12.
