Cylinder Works Standard Bore Replacement Cylinder (422-20015 / CW20015) | Yamaha YZ85 (2002-2018)
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High-performance standard bore replacement cylinder engineered to restore factory performance and reliability for high-revving junior two-stroke 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: 422-20015
- Alternative Part Number: Cylinder Works CW20015
- Component Type: Standard Bore Replacement Cylinder
- Bore Size: Standard (47.50 mm)
- Material & Construction: Cast aluminum with nickel silicon carbide plating
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Yamaha | YZ 85 | Two-Stroke Junior Motocross | 2002–2018 |
TSO Garage Note
A dependable solution for bringing a junior YZ85 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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