Cylinder Works Standard Bore Cylinder Kit (422-50013K01 / CW50013K01) | KTM 85 SX / Husqvarna TC 85 / GasGas MC 85 (2018-2025)

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: 422-50013K01
• Alternative Part Number: Cylinder Works CW50013K01
• Kit Type: Complete Standard Bore Cylinder, Piston, and Gasket Kit
• Bore Size: Standard (47.00 mm)
• Material & Construction: Cast aluminum cylinder with nickel silicon carbide plating, matched with a high-performance Vertex piston

Two-Stroke Vehicle Fitment

TSO Garage Note

The ultimate hassle-free solution for bringing a late-model Austrian 85cc mini-moto 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 a matching Vertex piston, top-end gaskets, and wrist pin bearing. It delivers exact factory port timing, correct clearances, and rock-solid reliability to keep high-strung junior engines pulling strong on the track or trail.