Some items from this specific schematic: Bolt,socket,10x42, Rod Assy.,cush Co, Nut,u,flange,10mm, Collar,damper Low.
On this parts fiche the Needle Brg is the most specified component.
The most reasonably priced component used on the Xl600v Transalp 1993 (p) England Rear Cushion (xl600vk/vl/vm/vn/vp/vr) is the Nut,u,flange,10mm.