How to adjust the valve clearance of scooter? How to determine whether it is timely?

1. Twice adjustment method. According to the structural principle of valve train, we know that the arrangement of intake valve and exhaust valve is regular. According to the ignition sequence and the arrangement sequence of intake and exhaust valves, the clearance of four (four-cylinder engine) or six (six-cylinder engine) valves can be checked and adjusted; Then turn the crankshaft once so that four or six cylinders are at the compression top dead center position, and then adjust the other four or five or six valves.

2. Cylinder by cylinder adjustment method. Because the order of engine valves is different, it is difficult to remember the order of intake valves and exhaust valves. The throttle clearance can also be adjusted cylinder by cylinder according to the ignition sequence or injection sequence of the engine. In order to accurately adjust the valve clearance, you can use the direction of the distributor burner to adjust the intake and exhaust valve clearance of the cylinder one by one.