1. Start the engine and let it run until the coolant temperature reaches 80-95°C.
2. Check up installation of the moment of ignition and frequency of rotation of idling, if necessary adjust them.
3. Disconnect the air supply hose.
4. Remove the valve cover.
5. Remove the front toothed belt cover.
6. Turn the shaft clockwise and align the alignment mark with the camshaft sprocket mark.
7. While holding the rocker arm adjusting screw from rotating with a screwdriver, tighten the locknut.
8. Turn the crankshaft clockwise one full turn (360°).
9. Verify that the specified intake valve clearance is within specification.
10. Repeat steps 8 and 9 to adjust the remaining valve clearances.