Cylinder Works Standard Bore Cylinder Kit (422-20015K / 20015-K01) | Yamaha YZ85 (2002-2018)
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Complete high-performance standard bore cylinder kit engineered to deliver a comprehensive, ready-to-install top-end refresh for high-revving junior two-stroke engines. Features a premium cast aluminum cylinder finished with a durable nickel silicon carbide (NSC) electroplate bore and diamond honed to exact specifications, paired with matching top-end components to ensure optimal ring seal, reduced friction, and superior heat dissipation under aggressive racing conditions.
Specs & Details
- Manufacturer Part Number: 422-20015K
- Alternative Part Number: Cylinder Works 20015-K01
- Kit Type: Complete Standard Bore Cylinder and Piston Kit
- Bore Size: Standard (47.50 mm)
- Material & Construction: Cast aluminum cylinder with nickel silicon carbide plating, matched with high-strength forged or cast piston components
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| Yamaha | YZ 85 | Two-Stroke Junior Motocross | 2002–2018 |
TSO Garage Note
The ultimate hassle-free solution for bringing a junior YZ85 back to life. Instead of piecing together separate gaskets, rings, and pistons or waiting weeks for a replating service, this complete kit bundles a premium nickel silicon carbide-plated cylinder with matching top-end components. It delivers exact factory port timing, correct clearances, and rock-solid reliability to keep high-strung mini-moto engines pulling strong on the track or trail.
Compatibility
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