Cylinder Works Standard Bore Replacement Cylinder (422-20011 / CW20011) | Yamaha YZ125 (2005-2026)
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High-performance standard bore replacement cylinder engineered to restore factory performance and reliability for modern high-revving two-stroke motocross engines. Cast from high-grade aluminum and finished with a durable nickel silicon carbide (NSC) electroplate bore. Diamond honed to exact specifications to ensure optimal ring seal, reduced friction, and superior heat dissipation under aggressive racing conditions.
Specs & Details
- Manufacturer Part Number: 422-20011
- Alternative Part Number: Cylinder Works CW20011
- Component Type: Standard Bore Replacement Cylinder
- Bore Size: Standard (54.00 mm)
- Material & Construction: Cast aluminum with nickel silicon carbide plating
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Yamaha | YZ 125 | Two-Stroke Motocross | 2005–2026 |
| Yamaha | YZ 125X | Two-Stroke Cross-Country | 2020–2026 |
TSO Garage Note
A dependable solution for bringing an aluminum-frame YZ125 back to life. When deep scoring, thermal damage, or worn-out plating ruins your original bore, this direct-fit replacement cylinder saves you the wait and hassle of stripping and replating a core, giving you exact factory port timing and rugged durability for the track or trail.
Compatibility
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