The function of motorcycle air filter is: 1. Make the air conditioning grid tight to ensure that it does not enter the carriage without filtering the air; Fumes, ozone, odors, carbon oxide, SO2, CO2 may be strong and long adsorbed to moisture; 4. Make the car glass steam steam, the driver's eyes clear, drive safety; Clean without breeding bacteria. A motorcycle air filter is a device that purifies the air. It consists of a housing and a filter element, and the filter element is arranged in the housing. There are various foreign bodies in the atmosphere, such as dust, sand particles, etc., which will accelerate the wear of the engine, thereby reducing the service life of the engine. Sometimes the tires pick up the stones. After entering the engine, the engine may be severely damaged. An air filter can prevent this. In order to increase the amount of air intake, the air filter housing is usually large. Many cars are designed as part of the frame into the air filter