The most reasonably priced component used on the Xl600r 1985 (f) Usa Swingarm is the Screw,6x12.
The Swingarm is made up of components including this Fork Assy.,rear which is the most expensive.
A sample from the products for the Swingarm include: Chain Set,drive, Needle Brg, Bearing,pivot, Emb.,rr.fork.