Motorcycle Cylinder Kit Set For NX125 NX 125 125cc Upgrade to 150cc Modification Engine Cylinder barrel for 125cc is marked as 124cm3 and 150cc is marked as 149cm3.This cylinder kit is designed as a direct replacement for the unit.The set includes one cylinder block, one piston kit, one ring kit, and one gasket kit.Installation instructions are not included.The product is intended for engine modification from 125cc to 150cc and fits compatible motorcycle models.The image shown is for reference only and represents the item to be received. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.