Abnormal sound of Yamaha Tian Jian camshaft.

Does the subject want to ask, "What should I do if the camshaft of Yamaha Tian Jian is abnormal?" ?

1. First, the sounding part is on the camshaft side, and slowly change the throttle. The noise is clear at idle speed, obvious at medium speed, chaotic or weakened or even disappeared at high speed, which may be the abnormal sound of camshaft.

2. Secondly, remove the valve cover, press the camshaft with a metal rod, and listen to the change of noise. If the noise changes, the camshaft will ring.

3. Finally, touch the metal bar or stethoscope near the cylinder bearing to determine the position of abnormal sound.