The Air Distributor assembly is constructed from several parts from which the Distributor Assy. is the most expensive.
Parts such as the Air Distributor: O-ring,5.8x1.9, Hose Comp.,air, O Ring, 7.8x2.2, Washer,cap are included in the Gl1500 Goldwing 1988 (j) Austria / Kph Air Distributor parts fiche.
In this schematic the "O-ring 7mm" is used most often.