Radiator of motorcycle engine

The utility model relates to a radiator of a motorcycle engine, which is arranged on the back of an engine. The utility model is characterized in that funnel-shaped air inlets (1) are arranged at the front end and the side surface of an air inlet pipe (2), the air inlet pipe (2) is provided with an air outlet (3) which faces directly to the part between two heat radiating fins of the engine, the end of the air inlet pipe (2) is enclosed, and the air inlet pipe (2) is bent along a cylinder cover (4) and a cylinder (5) of the engine. The utility model has the advantages that because the air inlets are in a funnel shape, the wind intake quantity is large, the wind power is strong owing to the small air outlet, each part of the engine is blown with cold wind, the heat radiation of the engine is uniform, and the utility model overcomes the defects of non-uniform heat radiation and inconformity of heat expansion and cold contraction. Therefore, the utility model prolongs the service life of the engine, and improves the product quality.