In this schematic the "Pin,step Bar" is used most often.
Parts such as the F-21: Bolt,hex.,cap,8x2, Arm,r.pillion Ste, Rubber,step, Arm R Step are included in the Nt400 Bros 1989 (k) Japan Nc25-105 F-21 parts fiche.
Of all the components that make up this F-21 the Pin,cotter 1.6x15 has the lowest price.