The most reasonably priced component used on the Gl1500se Goldwing Special Edition 1992 (n) Finland / Kph Tubing (7) is the Screw,tap.5x10.
A sample from the products for the Tubing (7) include: Plug,sealing, Tube C,pb, Tube G,air Intake, Stay,shot Air Val.
In this schematic the "Clamp D 12.0 Tube" is used most often.