Air filter of motorcycle engine

The air filter of the motorcycle engine comprises an air inlet box, a connecting pipe, a resonant cavity, a filter element component, an outer cover and an air inlet pipe. And when observed from the upper part of the air filter, the resonant cavity is positioned between the air inlet pipe orifice of the air inlet pipe and the connecting pipe. Therefore, a placement position with great benefits tothe resonant cavity can be provided, the resonant cavity becomes a protection device of the air filter, sand, dust and water drops entering the air filter can be effectively reduced, the quality of air sucked by the engine body is improved, the damage probability of the engine is reduced, and the service life of the filter element component is prolonged. Besides, the influence of the resonant cavity on the performance output of the engine can be effectively reduced due to the arrangement position of the resonant cavity, the noise during air suction is effectively inhibited, and more guaranteeand better riding feeling