How to adjust the valve of overhead camshaft?

About "How to Adjust the Valve of Overhead Camshaft?" Introduce the following related contents:

The adjustment method of the overhead camshaft valve is as follows:

1. Remove the intake valve, exhaust valve chamber cover and magneto cover;

2. Rotate the magneto rotor, so that the "T" scribing line on its outer circular surface is aligned with the scribing line on the shell, and the piston should be located at the top dead center of the compression stroke;

3. Carefully insert the feeler gauge with the specified valve clearance value into the valve clearance and pull it back and forth. If you feel a little resistance, it is appropriate to clear the warehouse;

4. If the clearance is not suitable, loosen the adjusting nut first, turn the adjusting screw with a small wrench, and pull the feeler gauge to check the clearance. After the clearance is appropriate, tighten the adjusting nut;

5. In order to prevent the gap from changing after the nut is tightened, use a feeler gauge to re-measure.