Wiseco SK1202 Pro-Lite 2-Stroke Piston Kit 68.25mm for Polaris 440 Snowmobile

The Wiseco SK1202 is a complete Pro-Lite forged 2-stroke piston kit designed for Polaris 440 snowmobiles with a cast iron bore. Engineered to an oversize bore of 68.25mm (+0.53mm over standard), this top-end rebuild kit delivers the strength, precision, and reliability that serious snowmobile riders demand.

Kit Specifications:

• Piston Type: Pro-Lite Forged Aluminum
• Bore – Actual: 68.25mm
• Bore – Standard: 67.72mm
• Oversize: +0.53mm
• Stroke: 60.00mm
• Displacement: 439cc
• Cylinders: 2
• Ring Type: Double Ring
• Wrist Pin: 18mm (S459)
• Bore Type: Cast Iron

Kit Contents:

• 2x Wiseco Pro-Lite forged pistons (P/N 2343M06825)
• 68.25mm ring set (P/N 2687CD)
• 18mm wrist pins (P/N S459)
• Round wire pin locks – 18mm, pair (P/N CW18)
• Top-end gasket kit (P/N W5101)

Why Wiseco Forged Pistons?

Wiseco Pro-Lite forged pistons are the result of decades of 2-stroke piston development, forged and machined entirely in the USA. Unlike cast pistons, Wiseco forgings feature a condensed, aligned grain structure that delivers superior mechanical strength, impact resistance, and fatigue life. Each piston is CNC machined to an optimal cam shape and profile, maximizing horsepower output and service life. Wiseco controls every step of the manufacturing process — from raw bar stock to skirt coating — ensuring consistent quality and precise tolerances in every kit.

This complete top-end rebuild kit contains all necessary components for overboring or rebuilding your snowmobile's top end. Note: Wiseco rings are application-specific and are not interchangeable with other ring types.