ZS174MN-5 Motorcycle 77mm Cylinder Block Piston Pin Ring Gasket Kit For KEWS NB350 NB300 Engine 300cc Upgraded to 350cc Type: NB350 Cylinder Kit Material: Aluminum Engine: ZS174MN-5 Bore Size: 77mm Piston Pin Size: 16mm Weight: 2103g Color: As shown in the picture Quantity: 1 Kit Equipped with Japan RIK competition piston rings. cylinder block produced in the same system. NB300 engine can be directly installed and upgraded to 350cc. Includes cylinder block, piston, piston pin, piston rings, and gaskets. Fitment For ZS174MN-5 NB300 Engine 300cc Upgrade To 350cc Suitable for KEWS FXMOTO, ROCKOT, JL, AVANTIS , REGULMOTO AQUA, ZUUMAV K8 A9, GR7, GR8, HENGJIAN S6 S7, BRZ K10, STN, XGZ G26, AJ1, BSE BNK and other motorcycles with NB350 NB300 Engine Package Includes 1 x Cylinder Kit Installation instructions are not included Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.