The Step assembly is constructed from several parts from which the Arm Comp.,r.step is the most expensive.
Parts such as the Step: Nut,hex 6mm, Nut,hex.,6mm, Bolt,hex 6x25, Arm Comp.,l.step are included in the Xr500r 1982 (c) Usa Step parts fiche.
Check out any of the nineteen Step components enlisted.