Parts such as the Front Shock Absorber: Oil Seal,35x48x11, Bolt,hex.,6x8, Bolt,hex 6x8, O-ring (25.7x28) are included in the Xr500 1980 (a) Usa Front Shock Absorber parts fiche.
The most reasonably priced component used on the Xr500 1980 (a) Usa Front Shock Absorber is the Washer,fr.fork.
The most expensive part in this assembly is the Case,comp,l,bot.