The sixteen Gl1500 Goldwing 1990 (l) Switzerland Final Shaft component parts are all listed in this schematic.
Some items from this specific schematic: Collar,22x26x27.6, Spring,final Damp, Shaft,final Gear, B/brg Rad N/com.
The Final Shaft is made up of components including this Shaft,final Gear which is the most expensive.