Parts such as the E-4 Cam Chain-tensinoer: Tensioner,lock Sh, Bolt,flange,6x25, Chain,cam, Sprocket,cam are included in the Xl600r 1987 (h) E-4 Cam Chain-tensinoer parts fiche.
The most expensive part in this assembly is the Chain,cam.
The component with the lowest price in the E-4 CAM CHAIN-TENSINOER schematic is the Bolt,hex.,knock,7.