NC250 Rocker Arms Shafts Kit For ZS177MM 250cc BSE KAYO Dirt Bike This rocker arms shafts kit is designed for the ZS177MM NC250 250cc 4 stroke 4-valve water-cooled engine.The engine is commonly used on various dirt bike models including MOTOLAND, SM-MOTORS, BRZ, MOTAX, FXMOTO, AVANTIS, HENGJIAN, GUIZUN, KEWS, BEIHAI, BOSUER, BSE, Xmoto, KAYO T6, BSE J5, RX3, and ZS250GY-3. Package includes components as shown on the product page. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.