GY6 Single Cylinder 4 Stroke 150CC Scooter ATV Go Kart Motor Engine Set This complete engine includes carburetor, CDI, starter solenoid, coil, used in a wide variety of applications, including full-size street legal scooters, all terrain vehicles (ATVs), dirt bikes, and go karts, compatible with 150cc engine size scooters and vehicles. 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,