Cylinder Works Big Bore Power Valve Kit (422-2002PV / CW-PV-K02) | Yamaha YZ250 (1999-2025)
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High-performance big bore power valve kit engineered to match enlarged cylinder bores, restoring smooth exhaust port timing, optimal low-end pull, and crisp throttle response for high-output two-stroke engines. Manufactured to strict 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: 422-2002PV
- Alternative Part Number: Cylinder Works CW-PV-K02
- Component Type: Big Bore Replacement Power Valve Kit
- Bore Compatibility: Big Bore (72.00 mm)
- Material & Construction: High-strength, wear-resistant alloy components built to precision tolerances
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Yamaha | YZ 250 | Two-Stroke Motocross / Big Bore | 1999–2025 |
TSO Garage Note
An absolute necessity when stepping up to a big bore setup on your YZ250. Standard power valves will not clear an enlarged 72.00mm cylinder bore properly; dropping in this matched big bore power valve kit ensures correct port clearance, smooth governor actuation, and reliable power delivery across the entire RPM range without risking mechanical interference.
Compatibility
Fetching compatibility details...
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