Yinxiang YX140 140cc 56mm cylinder kit includes a complete cylinder block assembly with piston and gasket set designed for motorcycle pit bikes and bikes.The kit features a -machined cylinder, piston, connecting rod, piston pin, rings, and all necessary gaskets for installation.This replacement part is engineered to restore engine performance and compression.The 56mm bore size supports standard engine configurations.Components are built to meet specifications for proper fit and function.Suitable for use in small displacement off-road motorcycles requiring a 140cc engine upgrade or repair.Important: This is an independent aftermarket part.Brand/model references serve only to show compatibility.