The Washer,plain,6mm is the lowest priced item on this Rear Fender schematic.
Parts such as the Rear Fender: Nut,special,6x7, Fender, Rr. (wl) *ty, Bolt,flange,sh,6x16, Collar,b are included in the Cr125r 2001 (1) European Direct Sales / Cmf Rear Fender parts fiche.
The Honda REAR FENDER has five products enlisted in the schematic.