What is the noise of Qianjiang Longfei engine?

First, determine whether there are other abnormal noises or whether it is the same as the normal working sound, but the volume is getting louder and louder.

If there are no other abnormal noises, there are several common possibilities: there are more carbon deposits in the engine, air intake and throttle. In addition, as the maintenance cycle approaches, engine noise will increase due to weak oil wear.

You think the engine is getting louder, so you'd better go to a professional repair shop for repair. In the case of uncertainty, we should blindly draw conclusions so as not to cause unnecessary losses and waste time and energy.