In this schematic the "Needle Brg" is used most often.
Check out any of the twenty-five Rear Cushion (xl600vk/vl/vm/vn/vp/vr) components enlisted.
Some items from this specific schematic: Damper Comp.,rr., Bolt,socket,10x42, Nut,flange 12mm, Cushion Assy.,rr..