Cylinder Kit 39.50/Std Cylinder Works Standard Bore Cylinder Kit (422-50012K / CW50012K) | KTM 50 SX / Husqvarna TC 50 (2009-2021)Husq/Ktm
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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 tolerances, paired with matching top-end components to ensure optimal ring seal, reduced friction, and maximum thermal efficiency under aggressive racing conditions.
Specs & Details
- Manufacturer Part Number: 422-50012K
- Alternative Part Number: Cylinder Works CW50012K
- Kit Type: Complete Standard Bore Cylinder and Piston Kit
- Bore Size: Standard (39.50 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 |
| KTM | 50 SX | Two-Stroke Junior Motocross | 2009–2021 |
| Husqvarna | TC 50 | Two-Stroke Junior Motocross | 2017–2021 |
TSO Garage Note
The ultimate plug-and-play solution for rebuilding a tired or damaged junior mini-bike top end. Sourcing matching components individually adds unnecessary downtime and guesswork; this complete kit bundles the nickel silicon carbide-plated cylinder and matching piston assembly together, ensuring exact factory port geometry, correct clearances, and reliable performance right out of the box for high-strung 50cc racing engines.
Compatibility
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