Wiseco 39.50mm Piston Kit for KTM 50 SX 2001-2008 803M03950

The Wiseco 39.50mm piston kit delivers the compression ratio stability and durability your KTM 50 SX demands during sustained racing or aggressive trail riding. Built from high-silicon aluminum alloy and featuring E-coated critical surfaces, this forged piston maintains consistent performance across thermal cycles while resisting wear in high-stress applications. Whether you're chasing lap times or maximizing reliability in competition, this complete kit eliminates guesswork with matched rings, wrist pins, and circlips engineered as a system.

• High-silicon aluminum alloy
• Forged construction
• E-coated crown and grooves
• 39.50mm bore diameter
• Includes forged rings
• Stainless wrist pins
• Circlips included
• Reduced machining (GP Series)
• Boost ports removed
• Enhanced top-end performance
• Fits KTM 50 SX 2001–2008
• MPN: 803M03950