Cylinder Works Replacement Cylinder Head Assembly (422-2001HD / CH2001-K01) | Yamaha YZ250 (1999-2026)
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High-performance replacement cylinder head assembly engineered to restore optimal combustion efficiency and thermal management for high-output two-stroke engines. Manufactured from high-grade cast aluminum with optimized squish band geometry and coolant flow channels to resist detonation, reduce operating temperatures, and withstand the extreme pressures of aggressive racing environments.
Specs & Details
- Manufacturer Part Number: 422-2001HD
- Alternative Part Number: Cylinder Works CH2001-K01
- Component Type: Replacement Cylinder Head Assembly
- Material & Construction: High-grade cast aluminum engineered to strict OEM thermal and structural tolerances
- Compatibility: Direct bolt-on replacement for stock cylinder configurations
TSO Garage Note
A reliable, cost-effective replacement cylinder head for legendary YZ250 powerplants. Whether you're rebuilding after a detonation failure or refreshing a high-hour race engine with compromised squish bands, this casting restores proper combustion chamber geometry and cooling efficiency without the high cost of an OEM assembly.
