Description 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 The actual displacement of the engine is 125cc but compatible with both 125cc and 150cc engine size scooters and vehicles Feature 1 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 2 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 3 Forced Air cooled Engine There are metal fins covering the outside of the cylinders and the heat generated by the engine is released directly into the air when the cooling fan blows air over fins It has the advantages of simple structure light weight wide adaptability to climate change rapid start up and no need of radiator High flow Oil Pump Reduces the wear of friction pairs and prolongs the engine service life 4 Lubricating Oil Strainer Helps removing solid contamination from lubricating oil largely reducing the wear of friction pairs and prolonging the engine service life 5 Aluminum Cylinder HeadBody Improves the heat dissipation capability cuts the weight and increases the torque of the engine Specification Engine Type GY6 Single Cyl