The most reasonably priced component used on the Kl250a2 Klr250 1979 Canada Rear Hub/brake is the Washer-plain-small,6m.
Parts such as the Rear Hub/brake: Cam Shaft,rear Brake, Bearing-ball,#6205c3, Drum Assy,rear Brake, Nut,16mm are included in the Kl250a2 Klr250 1979 Canada Rear Hub/brake parts fiche.
In this schematic the "Nut,10mm" is used most often.