How to add valves in combat

Steps to increase the valve vigorously:

1. Open the engine compartment and loosen the fixing screw of the regulating valve first.

2. Turn the magneto of the crankshaft to make the camshaft rise against the exhaust valve.

3. Hold the valve screw and pull it up.

4. Pull up the valve screw and adjust the fixing screw by tightening it several times.

5. Tighten the screws with needle-nosed pliers.

6. Clamp the screw with needle-nosed pliers and tighten the adjusting screw with adjustable wrench to increase the valve.