The most reasonably priced component used on the Xl600v Transalp 1987 (h) Austria Rear Cushion (xl600vh/vj) is the Joint,pipe.
On this parts fiche the Nut,u,flange,10mm is the most specified component.
The Rear Cushion (xl600vh/vj) is made up of components including this Damper Comp.,rr. which is the most expensive.