Wiseco Pistons PK1642 Top End Piston Kit for KTM SX - 50 39.5mm

The Wiseco PK1642 Top End Piston Kit is engineered for 2001-2008 KTM 50 SX LC models with a 39.5mm bore size. This complete kit provides everything needed for a professional top end rebuild or overbore application on your KTM mini motocross bike.

Kit Includes:

• Forged piston designed to Wiseco's exacting specifications
• Piston rings for optimal compression and seal
• Wrist pin and circlips
• Complete top end gasket set

Wiseco pistons are forged from high-silicon aluminum alloy for superior strength and durability under the demanding conditions of two-stroke motocross racing. The forging process creates a denser grain structure compared to cast pistons, allowing them to withstand higher temperatures and cylinder pressures. This kit eliminates the guesswork of sourcing individual components by providing all critical top end parts in one package, ensuring proper fitment and compatibility.

The 39.5mm bore size represents an overbore option for restoring performance in worn cylinders or increasing displacement. Each piston features Wiseco's proven skirt profile and ring groove design for reliable performance and extended service life.