Parts such as the F-10: Pin,cotter 2.0x15, Nut,u.,6mm, Axle,rr.wheel, Washer,8mm are included in the Xz100 Ape 2002 (2) Japan Hc07-100 F-10 parts fiche.
The Nut,hex.,8mm is the lowest priced item on this F-10 schematic.
On this parts fiche the Spring,brake.shoe is the most specified component.