In this schematic the "Bolt,knock 7x12" is used most often.
The component with the lowest price in the E-4 CAM CHAIN-TENSINOER schematic is the Bolt,flange,6x25.
Parts such as the E-4 Cam Chain-tensinoer: O-ring,14.8x2.4, Bolt,knock 7x12, Sprocket,cam, Pin,dowl 5x33 are included in the Xl600r 1984 (e) E-4 Cam Chain-tensinoer parts fiche.