Hello, may I ask my Yinglang GT 12, which is always a little shaky and occasionally reverses? What is that?

I don't know how many kilometers I have traveled, but there are generally two kinds of jitter: one is fault jitter, such as a cylinder working badly and leaking air. This is a very obvious phenomenon; The other is normal jitter, but it is relatively uniform. You can hardly feel it when sitting in the car, and the acceleration is normal. You can refer to the test. In addition, after the engine is used for a period of time, the throttle may have some carbon deposits, which will also affect the stability of idle speed and cause the engine to shake intermittently. If necessary, you can go to the service shop and ask a technician to check it.