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. Its 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 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. Compression ratio: 9.2:1. Rated power (kw/r/min): 5.2kw/7000r/min. Engine Type: GY6 Single Cylinder 4-Stroke. Compatible with 150cc GY6 10short box engine size scooters and vehicles. NoticeAdd engine oil before useThis machine is 10short case. We have warehouses in the USA. E-mails are answered Monday through Saturday. Please allow up to 48 hours for a response to your message 3. The item "GY6 4 Stroke 150cc Scooter Motorcycle ATV Dirt Bikes Engine with Kick Start Lever" is in sale since Thursday, October 10, 2019. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Complete Engines". The seller is "devemart2013" and is located in Perth Amboy, New Jersey. This item can be shipped to United States.