The Cylinder Works CW20013K01 Cylinder Kit is a complete standard-bore, high-compression top-end solution for select Yamaha 250F models. Designed with a 77.00 mm standard-bore cylinder and a 13.8:1 compression ratio, this kit helps restore engine performance while maintaining a stock-style appearance. It includes the cylinder, matched Vertex piston kit, and required gaskets for a reliable replacement or performance-focused rebuild.
Features: Matched Vertex piston components help support longevity, performance, and reduced engine noise. The cylinder is nickel silicon carbide plated for extended service life and wear resistance, and its stock-like appearance integrates cleanly with the original engine design. No machine work is needed for installation when used as intended, helping simplify the top-end replacement process. The top-end gasket kit does not include valve stem seals.
This Cylinder Works standard-bore replacement cylinder kit fits 2019 through 2022 Yamaha YZ250F models, 2020 through 2022 Yamaha YZ250FX models, and 2020 through 2022 Yamaha WR250F models. It is intended for standard-bore applications and includes the major components needed for a complete top-end service. Replacement pistons, gaskets, and ring sets are also available separately for future maintenance. Verify the motorcycle model year and engine configuration before installation.
Features:
- Complete standard-bore high-compression kit with a 13.8:1 compression ratio
- Includes cylinder, matched Vertex piston kit, and gaskets
- 77.00 mm standard-bore cylinder designed for select Yamaha 250F engines
- Nickel silicon carbide plating supports longer cylinder life and wear resistance
- Stock-style cylinder appearance for clean integration with the original engine
- No machine work needed for intended standard-bore installation
- Matched Vertex piston components help support longevity, performance, and reduced engine noise
- Top-end gasket kit does not include valve stem seals
- Fits 2019-2022 Yamaha YZ250F, 2020-2022 Yamaha YZ250FX, and 2020-2022 Yamaha WR250F models
- Brand: Cylinder Works
- Manufacturer part number: CW20013K01
- Vendor part number: 422-20013K
Fitment:
2019 Yamaha YZ250F
2020 Yamaha WR250F
2020 Yamaha YZ250F
2020 Yamaha YZ250FX
2021 Yamaha WR250F
2021 Yamaha YZ250F
2021 Yamaha YZ250FX
2022 Yamaha WR250F
2022 Yamaha YZ250F
2022 Yamaha YZ250FX
2023 Yamaha WR250F
2023 Yamaha YZ250F
2023 Yamaha YZ250FX
2024 Yamaha WR250F
2024 Yamaha YZ250F
2024 Yamaha YZ250FX