Parts such as the Air Pump: Hose Assy.b,air, Grommet,saddle Ho, Pump Assy.,air, O-ring,49.5x2 are included in the Gl1500a Goldwing Aspencade 1997 (v) Austria / Kph Air Pump parts fiche.
In this schematic the "Grommet" is used most often.
Check out any of the nineteen Air Pump components enlisted.