The fourteen Cb450s 1986 (g) France / Yb Rear Cushion component parts are all listed in this schematic.
A sample from the products for the Rear Cushion include: Case,rr Cush Up, Damper,comp,rear, Nut,hex.,10mm, Spg.rr.cush.
The Rear Cushion assembly is constructed from several parts from which the Cushion Assy,rear is the most expensive.