This 250cc Big Bore Cylinder Kit is designed to upgrade compatible Honda engines by increasing displacement for improved performance and reliability. With precision-engineered components and construction that meets or exceeds OEM standards, it offers a dependable solution for riders seeking greater engine output. Features Increases engine displacement to 250cc for enhanced power Precision-engineered components ensure optimal fit and function Manufactured to meet or exceed OEM quality standards Specifications Bore Size: 65.5mm Cross-Reference OEM Part Numbers Honda ATC200X (1986-1987): Cylinder OEM Part Number: 12100-VM0-000 Honda CRF230L 2008-2009: 12100-KFB-000 Honda CRF230F 2003-2019: 12100-KFB-000 Part Number: 56-K233.KIT Vehicle Fitments Honda ATC 200X (1986-1987) Honda XL200 XR200 Honda CB250 Honda CRF230F 2003-2019 Honda CRF230L 2008-2009