【REPLACEMENT】Kazuma viper 110/SSR 110/Kazuma Falcon 110/Panda 100/Coyote 110/Redcat 110/Roketa 110/BMS 110/Sunl 110/Coolster 110/ 4-Stroke 1P52FMH Horizontal Engine 110cc ATV Dirt Pit Bike Go Karts Quad 4 Wheeler Dune Buggys Motorcycle;【NOT FOR】125cc Cylinder Head with 23mm and 28mm Intake and Exhaust valves; 【SIZE】28 tooth sprocket;The Cylinder Diameter:52.4mm/2.1";Mounting hole distance:47mm/1.85“；45mm/1.77";Mounting hole diameter:8mm/0.31;intake hole diameter:45mm/1.77";Please pay attention to whether the size matches your needs when purchasing. 【CONTENT】1 x Complete Cylinder Head, 1 x Big Bore Complete Cylinder,1 x Piston Ring Kit,4 x Gaskets,1 x Spark Plug 【HIGH PERFORMANCE】Cylinder big bore kits with high toughness,Adoption of optimized cooling channel design effectively improves the heat dissipation efficiency and ensures that the engine maintains a stable operating temperature during high load operation, prolonging engine life. 【Service】We hold a deep commitment to delivering exceptional service quality. Your satisfaction is our top priority. Should you encounter any issues during or after your purchase, please reach out to us. We are committed to resolving them promptly and ensuring a positive experience for our customers. Replacement for：For Most Chinese 110CC Engines,Atv,Dirt Bike,Pit Bike,Go Kart,Pocket Bike Use Pistons of This Size For Most Chinese Brands, Like Taotao, Buyang, Coolsport, Lifan Kazuma, Sunl,Redcat,Etc. For 4 Stroke 110CC Engines,Quad,Atv,Ssr,Kazuma,Falcon,Panda,Lacoste,Coyote,Redcat,Rokata,Bms,Sunl,Coolster,Pit Bike,Dirt Bike,Go Kart,Tao Tao, CR110 Not Fit Replacement For： 2016 Polaris,Honda 110 2021 Tao New Cheetah