On this parts fiche the Bolt,cl.cover is the most specified component.
Parts such as the Cam Chain: Adjuster Assy,tensioner, Chain Comp,camshaft Drive, Adjuster Assembly,tensioner, Bolt,cl.cover are included in the Dr-z400s 2003 (k3) Usa (e03) Drz400s Dr Z400s Cam Chain parts fiche.
Check out any of the sixteen Cam Chain components enlisted.