Parts such as the Step: Spg,l.step Return, Arm Comp.,r.step, Arm Assy.,l.pilli, Lever,r.pillion S are included in the Cbr400rr 1989 (k) Japanese Domestic / Nc23-109 Step parts fiche.
This STEP assembly utilises four Bolt,socket 8x20(s) - the highest specified component.