Parts such as the E-5 Cam Chain/tensioner: Spring,tensioner, Bolt,special,6x28, Nut,hex 6mm, Guide,cam Chain are included in the Cd195t 1980 (a) Nigeria E-5 Cam Chain/tensioner parts fiche.
The component with the lowest price in the E-5 CAM CHAIN/TENSIONER schematic is the Nut,hex 6mm.
Of all the components used in this assembly the Chain,cam is the most expensive.