Scooter 51.5mm Cylinder Kit & Piston For XC125 Cygnus125 1997-1999 Cygnus R 125cc 4T 2000-2003 Vino125 2V 4CW-E1310-10 This cylinder kit includes a cylinder and piston designed for with 125cc 4-stroke engines.It is compatible with specific models including the XC125, Cygnus125 from 1997 to 1999, Cygnus R 125cc 4T from 2000 to 2003, and Vino125 2V.The bore diameter measures 51.5mm, and the kit is engineered to fit engines requiring 4CW-E1310-10.Components are constructed to standard specifications for performance and proper engine function.