The Cylinder Works Standard Bore Cylinder Kit is designed for Honda CRF250R and CRF250RX four-stroke motocross and off-road motorcycles. This complete high-compression kit features a 79.00 mm standard-bore cylinder configuration with a 13.9:1 compression ratio, helping deliver dependable performance for engine rebuilds and top-end service. Manufacturer part number CW10011K03 and vendor part number 422-10011K3 identify this application-specific kit.
The kit includes the cylinder, piston kit, and required gaskets for a convenient replacement solution. The cylinder is styled to closely resemble the original equipment component and is nickel silicon carbide plated for extended service life, reliable heat transfer, and durable bore protection. Cylinder Works matches the cylinder with a Vertex piston to support longevity, performance, and reduced engine noise. No machine work is needed for installation when used with the appropriate compatible application and components.
This Cylinder Works kit fits 2022-2025 Honda CRF250R and CRF250RX models, including the 2025 Honda CRF250RWE. It is intended for standard-bore replacement and top-end rebuilding. The top-end gasket kit does not include valve stem seals, so inspect the existing seals and replace them separately when required. Replacement pistons, gaskets, and ring sets are available for future maintenance and service needs.
Features:
- Complete standard-bore high-compression kit for compatible Honda CRF250R and CRF250RX models
- 79.00 mm standard bore with a 13.9:1 compression ratio
- Includes cylinder, piston kit, and gaskets
- Matched with a Vertex piston to support longevity, performance, and reduced engine noise
- Nickel silicon carbide plated cylinder helps provide extended service life
- Cylinder design closely resembles the original equipment component
- No machine work needed for compatible applications
- Top-end gasket kit does not include valve stem seals
- Replacement piston, gasket, and ring sets are available
- Fits 2022-2025 Honda CRF250R, CRF250RX, and 2025 CRF250RWE models
Fitment:
2022 Honda CRF250R
2022 Honda CRF250RX
2023 Honda CRF250R
2023 Honda CRF250RX
2024 Honda CRF250R
2024 Honda CRF250RX
2025 Honda CRF250R
2025 Honda CRF250RWE
2025 Honda CRF250RX