If the air filter element is not replaced for a long time, the air filter will not be able to effectively filter out the suspended particles in the air, the engine will accelerate wear and carbon deposition, shorten the service life of the engine, and in severe cases, the phenomenon of "pulling the cylinder" may occur, so it is very important to replace the air filter regularly.

Air filter replacement steps:
1. First loosen the filter lock and remove the fixed nut;
2. After removing the protective cover, you can see the air filter element. If you find dirt inside or outside the filter element housing, you should wipe it off with a rag first;
3. Then you can replace the new filter element. However, it should be noted that the paper part of the filter element should not be touched by hand, especially the oil should not be contaminated with the filter element;
4. Finally, install the parts in the reverse order of disassembly.

The functions of the air filter are:
1. Air filter, when gasoline is burning, clean gasoline and clean air are mixed together, and the fuel can exert its maximum effect when it burns. In most places, the air quality is relatively poor, and the air filter is more important;
2. If the maintenance period is reached and the air filter has not been replaced, it will be more difficult for the engine to inhale. If the mixture of oil and gas is not in place, carbon deposition will increase, thereby increasing fuel consumption;
3. The oil filter element can filter out smaller impurities and reduce the wear and tear caused by the engine running. If there are fewer impurities, friction will be reduced when the engine is running, and fuel consumption will naturally drop.