Vertex 24212A Cast Replica Piston Kit Standard Bore - 46.94mm

The Vertex 24212A is a Cast Replica OEM Replacement Piston Kit designed for KTM 85 SX and Husqvarna TC85 two-stroke motocross engines. Manufactured in Italy, Vertex is the OEM piston supplier to KTM and numerous European motorcycle manufacturers, delivering factory-level quality in every kit.

This kit features a standard bore diameter of 46.94mm and is engineered to meet or exceed OEM specifications, making it an ideal direct replacement for stock 85cc two-stroke motors. The cast aluminum construction uses 18% silicone content for an excellent balance of light weight and exceptional strength, while a T-5 heat treatment hardening and tempering cycle ensures long-lasting durability under demanding race conditions.

Key Features:

• Standard bore: 46.94mm — OE stock compression ratio
• Gravity cast aluminum alloy with 18% silicone content — extremely light yet very strong
• T-5 heat treated for hardness and durability
• Molybdenum Disulphide (MoS2) skirt coating for reduced wear and faster break-in
• Exact-fit sizing (A, B, or C) to match your cylinder bore and minimize blow-by
• Replica pistons and all rings are OEM replacements meeting factory specifications
• Kit includes: piston, rings, wrist pin, and circlips — everything needed for a complete top-end rebuild

Vertex Cast Replica piston kits are the trusted choice for motocross riders and mechanics looking for a reliable, precision-fit replacement that restores factory performance. Manufactured under strict quality control standards in Italy, these kits are suitable for recreational and competitive racing applications alike.