ZS174MN-5 Motorcycle Engine Cylinder Kit 74mm Cylinder Block Piston Ring Pin Gasket For NB300 4T Water-Cooled Bike This engine cylinder kit is designed for compatibility with NB300 4T water-cooled motorcycles.It includes a 74mm cylinder block, piston, piston rings, wrist pin, and necessary gaskets.The components are engineered to meet specifications for proper fit and function.The cylinder is constructed to support efficient combustion and thermal management.The piston features grooves for ring installation and is connected via a wrist pin.Gaskets are included to sealing between engine components.This kit provides the essential parts needed for rebuilding or replacing the engine's end. This component is not from the brand.References to models are used only to indicate fitment.