1. Remove the top protective cover 8 (see fig. Camshaft Drive Diagram).
2. Loosen the bolts 6 fastening the bracket 11 of the tension roller and turn the crankshaft with a key two or three turns. In this case, the spring 12 will automatically set the required tension of the belt 10. Rotate the shaft smoothly, keeping the belt in constant tension and not allowing the belt to loosen when the shaft stops.
3. Tighten the bolts 6 and fix the top protective cover 8.