- Fitment : Designed specifically for the Chinese GY6 4-stroke 170cc 157QMI Engine featuring a 76mm bolt pattern. Please note, it is not compatible with 80mm bolt pattern engines. - Material : Constructed from durable aluminum alloy, this component combines lightweight properties with exceptional heat dissipation and high strength. The material is engineered to withstand significant cylinder pressure and loads, ensuring reliable performance. - Specifications : - Inner Diameter: 61mm - Outer Diameter: 65mm - Outer Diameter of Piston Pin: 15mm - Package Includes : - Cylinder - Piston - Piston Ring - Piston Pin - Piston Pin Clip - Valve Oil Seal - Gaskets - Tensioner Gasket - Exhaust Gasket - Intake/Exhaust Studs - Exhaust Nut Key Benefits : - Provides a complete engine rebuild solution to restore performance and reliability. - Ideal for replacing worn or damaged components to enhance engine efficiency and power output. - Perfect for mechanics and DIY enthusiasts looking to maintain or upgrade the GY6 engine. Applications : - Use this set for a thorough engine rebuild in scooters, mopeds, or ATVs equipped with the specified GY6 engine. - Essential for troubleshooting and repairing performance issues associated with worn cylinder parts. - Suitable for performance upgrades to increase the power and efficiency of your GY6 engine setup.