Wiseco SK1359 2-Stroke Forged Piston Kit 83.00mm Standard Bore Polaris 900

The Wiseco SK1359 is a 2-stroke forged piston kit featuring an 83.00mm standard bore, purpose-built for Polaris 900 snowmobile engines. Engineered, forged, and machined entirely in the USA at Wiseco's facility in Mentor, OH, this kit delivers the strength, precision, and reliability demanded by high-performance snocross and cross-country racing applications.

Key Features:

• 83.00mm standard bore forged piston designed specifically for the Polaris 900 engine
• Forged from aerospace-grade aluminum — compressed molecular structure increases density and aligns grain flow for superior strength
• Electra Coated skirts for reduced friction and extended service life
• Dedicated forging design with lightening operations to optimize the strength-to-weight ratio
• Improved tensile strength, impact resistance, and fatigue resistance compared to cast pistons
• Engineered using 3D design techniques and finite element modeling (FEM) software for maximum performance
• Kit includes matched and balanced forged piston(s), high-quality piston ring(s), wrist pin(s), and circlips
• OEM Alternate Part Number: 09030604

Unlike cast pistons, which are brittle and prone to catastrophic failure when material yield strength is exceeded, Wiseco's forged pistons feature a condensed, aligned grain structure that produces higher mechanical properties and resistance to both impact and fatigue. This makes the SK1359 an ideal upgrade for demanding snowmobile performance builds.

Wiseco is the only aftermarket piston manufacturer in the United States that produces pistons exclusively using the forging process, controlling every stage of production — from raw bar stock to skirt-coated finished parts — entirely in-house. In-house dyno testing and a dedicated R&D program ensure each piston design meets the rigorous standards of competitive motorsport.