STD 54mm Motorcycle Air Cylinder Block & Piston and Rings & Head Complete Gasket Kit For YZ125 YZ 125 2006-2022 This kit includes a cylinder block, piston, piston rings, and a complete head gasket set designed for compatibility with YZ125 models from 2006 to 2022.The components are engineered to fit standard 54mm configurations and support proper engine compression and performance.The piston is equipped with corresponding rings to effective sealing within the cylinder.The included gaskets cover all necessary sealing points for the cylinder head assembly.This set is intended for use in engine rebuilds or replacements where standard dimensions and component integration are required. This replacement part is manufactured independently.All brand references are used solely to denote compatibility with listed models.