For 72mm cylinder block piston ring pin kit compatible with XC XCW EXC TE TX 300 models from 2017 to 2018. This engine part set includes components designed for pit bike and dirt bike applications. The kit is intended for use in rebuilding or repairing two-stroke engines. It contains a piston, connecting rod, piston pin, piston rings, and related hardware necessary for cylinder assembly replacement. Designed to fit standard 72mm bore cylinders. Suitable for off-road motorcycles requiring this specific engine configuration. Part fits specified models within the given year range. This replacement part is manufactured independently. All brand references are used solely to denote compatibility with listed models.