Parts such as the Transmission: Washer,thrust, Circlip, Bearing(17x40x12), Circlip are included in the Jr50 1991 (m) Usa (e03) Transmission parts fiche.
The lowest price component in this Transmission parts-list fiche is the Circlip,16mm.
The seventeen Jr50 1991 (m) Usa (e03) Transmission component parts are all listed in this schematic.