GY6 Single Cylinder 4 Stroke 150CC Scooter ATV Go Kart Motor Engine Set Feature: High-flow Oil Pump: Reduces the wear of friction pairs and prolongs the engine service life. Aluminum Cylinder Head & Body: Improves the heat disation capability, cuts the weight and increases the torque of the engine. Crank Shaft: The engine is low speed with high torque and has large diameter bearings for crankshaft connecting rod, increasing the reliability of the bearings. Lubricating Oil Strainer: Helps removing solid contamination from lubricating oil, largely reducing the wear of friction pairs and prolonging the engine service life. CVT: CVT consist mainly of 2 transmission pulleys and 2 transmission belts. It??s compact, simple design offers seamless shifting between an unlimited amount of varying gear ratios, allowing a smooth rate of acceleration. Forced Air-cooled Engine: There are metal fins covering the outside of the cylinders and the heat generated by the engine is released directly int