How to adjust the valve clearance of high-speed single-cylinder air-cooled diesel engine

The flywheel is marked with the top dead center, and some have the injection timing mark. 0 is the top dead center mark. Turn the flywheel to the top dead center alignment mark of the compression stroke, which makes the flywheel fly heavier during the compression stroke. Remove valve cover. The exhaust valve is on the exhaust pipe side, and the intake valve on the intake pipe side is adjusted by about 30 lines.