Why is the engine vibration of curved beam motorcycle great after adjusting the valve clearance?

Generally, adjusting the valve clearance of curved beam motorcycle will not cause great vibration. If it is confirmed that the vibration becomes larger after adjusting the valve, the valve clearance can be rechecked. The valve clearance of the lower bone is generally 0.05mm, neither too big nor too small. In addition, check whether the screws fixing the engine to the frame are not tight enough. If the screws fixing the engine are not tight enough, it will also increase the vibration, and check the screws of the tripod.