Using this comprehensive cylinder piston kit will provide optimal performance for your GY6 125cc engine. This kit includes a precision designed 52.4mm cylinder, high-quality piston, piston rings, and all necessary gaskets for complete reconstruction. Suitable for the four stroke GY6 150 engine commonly found in ATVs, light motorcycles, and go karts, with engine types of 152QMI and 157QMJ. Each component is manufactured according to precise specifications to ensure correct installation and reliable operation. This kit features a durable aluminum cylinder with efficient heat sinks, a matching piston set with rings, and high-quality gaskets for proper sealing. Whether you are conducting daily maintenance or rebuilding the engine, this complete kit provides all the basic components in one package. Very suitable for power sports enthusiasts and mechanics seeking reliable replacement parts.