Cylinder Works Replacement Power Valve Kit (422-2001PV / CW-PV-K01) | Yamaha YZ250 (1999-2026)
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High-performance replacement power valve kit engineered to restore smooth exhaust port timing, optimal low-end pull, and crisp throttle response for legendary two-stroke engines. Manufactured to strict OEM specifications using durable, high-strength materials designed to resist carbon buildup, thermal warping, and mechanical wear under the intense pressures of aggressive racing environments.
Specs & Details
- Manufacturer Part Number: 422-2001PV
- Alternative Part Number: Cylinder Works CW-PV-K01
- Component Type: Replacement Power Valve Kit
- Material & Construction: High-strength, wear-resistant alloy components built to factory tolerances
- Compatibility: Direct-fit replacement for stock YZ250 exhaust governor and valve assemblies
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Yamaha | YZ 250 | Two-Stroke Motocross | 1999–2026 |
| Yamaha | YZ 250X | Two-Stroke Cross-Country | 2016–2026 |
TSO Garage Note
A crucial service replacement when carbon fouling, pin wear, or mechanical fatigue starts dragging down your YZ250's power valve operation. Refreshing worn-out valves with this kit ensures smooth governor actuation, prevents unpredictable hangs in the RPM range, and restores that hard-hitting, instantaneous two-stroke throttle response you expect on the track or trail.
Compatibility
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