Motorcycle 77mm Cylinder Block Bore Piston Pin Ring Gasket Set For ZS174MN-5 NB350 NB300 Pit Bike Accessories Material: Aluminum Engine compatibility: ZS174MN-5, NB350, NB300 Design: 77mm Big Bore Racing Cylinder Kit Displacement: Upgraded to 350cc for increased power and efficiency Parts included: Cylinder block, piston, piston pin, piston rings, gaskets This cylinder kit is designed to upgrade the engine displacement to 350cc, enhancing overall performance.The aluminum cylinder block is built for , paired with a 16mm piston pin and competition-grade piston rings for under conditions.Components are machined to proper fitment and function with ZS174MN-5, NB350, and NB300 engines. Installation is supported by standard procedures, allowing straightforward integration into compatible pit bike engines.The kit's design focuses on performance gains while maintaining mechanical.The assembled unit weighs 2103g, with a finish that blends with engine components. Suitable for riders looking to improve engine output, this cylinder set offers a direct path to greater displacement and improved efficiency in off-road applications. This product is not manufactured by the brand.Model and brand mentions are for compatibility guidance only.