Does the motorcycle need to adjust the valve?

Need. The valve clearance of motorcycle engine will be too large or too small after long-term riding. Too large or too small valve clearance will affect the power and starting performance of the engine, so it is very important to adjust the valve regularly.

Valve adjustment method:

1. Make sure that the piston is at the top dead center position before adjusting the air.

The new car can refer to the T line, open the cylinder head cover, turn the magneto counterclockwise, and let the observation well mark the "T" line. At this time, make sure that there is an axial gap between the intake and exhaust valves (adjust the coaxial direction of bolts) to determine the correct position, while the old car must press the starting lever and observe with eyes to gain experience.

Because the valve clearance can only be adjusted when the rocker arm reaches the top dead center, the spring automatically locks the valve in other positions, that is, if the valve clearance is released when it is not at the top dead center, the spring will automatically press the valve clearance.

The feeler gauge is a theoretical data.

Select a feeler gauge with a specified thickness, insert it into the valve gap and pull it back and forth. If you feel a little resistance, the gap is appropriate. If there is no resistance, it means that adjustment is needed. First find a small wrench to turn the adjusting screw, while pulling the feeler gauge to feel the resistance state, and then tighten the adjusting nut after the clearance is appropriate.

However, it is inconvenient to use the feeler gauge in actual operation, that is, loosen the nut, screw on the screw, and then plug the feeler gauge. The loose screw may have been moved by mistake, so the master can hardly see the feeler in the garage.

3, after the nut is loose

When you screw the screw by hand, you will feel resistance. You don't have to screw it to the end, and you don't have to back down. At this time, the clearance is almost optimal, and then lock the nut.