The Nut, 8mm is the lowest priced item on this Rear Hub/brake/chain schematic.
The most expensive part in this assembly is the Drum Assy,rear Brake.
Parts such as the Rear Hub/brake/chain: Spring,brake Shoe, Bolt-upset, Washer-plain-small,6m, Damper,shock,rr Hub are included in the Kl250a5 Klr250 1982 Usa Canada Rear Hub/brake/chain parts fiche.