Upgrade the top end of your compatible Honda motocross or cross-country motorcycle with the Cylinder Works Big Bore Cylinder Kit, part number CW11011K01. This 80.00 mm big bore kit is designed for select 2018-2021 Honda CRF250R and 2019-2021 Honda CRF250RX models, providing a 3.0 mm overbore and 13.5:1 compression ratio. The kit is engineered as a direct replacement-style solution that maintains a stock-like appearance while increasing displacement and supporting strong engine performance.
The kit includes the cylinder, matched piston kit, and required gaskets for a complete top-end installation. Cylinder Works pairs the cylinder with a Vertex piston to promote durability, consistent performance, and reduced engine noise. The cylinder features a nickel silicon carbide plating process for extended service life and dependable heat management. No machine work is required for installation when used with the specified application and supporting components.
Designed for fitment on 2018 Honda CRF250R; 2019 Honda CRF250R and CRF250RX; 2020 Honda CRF250R and CRF250RX; and 2021 Honda CRF250R and CRF250RX models. The manufacturer is Cylinder Works, and the vendor part number is CW11011K01. This kit is intended for big bore applications and should be installed by a qualified technician using the appropriate service procedures. Replacement pistons, gaskets, and ring sets are available separately. The included top-end gasket kit does not include valve stem seals.
Features:
- Complete big bore kit for select Honda CRF250R and CRF250RX motorcycles
- 80.00 mm bore with a 3.0 mm overbore
- 13.5:1 compression ratio
- Includes cylinder, matched Vertex piston kit, and gaskets
- Nickel silicon carbide plated cylinder for extended service life
- Stock-style cylinder appearance
- No machine work required for specified applications
- Matched Vertex piston supports durability, performance, and reduced engine noise
- Replacement piston, gasket, and ring sets are available
- Top-end gasket kit does not include valve stem seals
- Brand: Cylinder Works
- Manufacturer part number: CW11011K01
- Vendor part number: CW11011K01
Fitment:
2018 Honda CRF250R
2019 Honda CRF250R
2019 Honda CRF250RX
2020 Honda CRF250R
2020 Honda CRF250RX
2021 Honda CRF250R
2021 Honda CRF250RX