What is the adjustment method of motorcycle valve clearance?

The adjustment method of motorcycle valve clearance is: 1. Valve adjustment when the camshaft is above: remove the magneto housing and valve cover, and turn the magneto rotor counterclockwise so that the "T" notch on its outer circumferential surface is aligned with the notch on the housing. At this time, the piston should be at the top dead center of the compression stroke, and then select a feeler gauge with a specified thickness to insert into the valve gap and pull it back and forth. If you feel slight resistance, the clearance is appropriate. If not, it means it needs to be adjusted. First turn the adjusting screw with a small wrench, pull the feeler gauge to feel the resistance state, and then tighten the adjusting nut after the clearance is appropriate. 2. Adjustment of valve lateral clearance: Valve lateral clearance refers to the clearance between the end of the valve stem and the adjusting screw on the tappet. Remove the valve cover, take off the spark plug, then block the spark plug hole with your finger and press the starting pedal. When your fingers feel the impact of airflow, it means that the piston is already in the compression stroke. Put the screwdriver bit into the spark plug hole, and then slowly press the pedal. When the screwdriver rises to the highest point, the piston is at the top dead center, and then check and adjust the valve clearance. The method is the same as when the camshaft is overhead.