Wiseco SK1260 Pro-Lite 2-Stroke Snowmobile Top End Piston Kit 66.50mm Bore

The Wiseco SK1260 Pro-Lite Top End Kit is a complete 2-stroke piston kit engineered for high-performance snowmobile engines with a standard 66.50mm bore. Designed and manufactured entirely in the USA, this kit delivers the strength, precision, and durability demanded by serious snocross and cross-country riders.

Pro-Lite Forged Piston Technology:

• Forged aerospace-grade aluminum alloy construction for a superior strength-to-weight ratio versus cast alternatives
• CNC-machined cam shape and profile optimized for peak horsepower and maximum service life
• Dedicated forging design with extra lightening operations for enhanced throttle response
• Condensed, aligned grain structure delivers higher mechanical properties and superior resistance to impact and fatigue
• Engineered, forged, and machined in Mentor, OH, USA

Complete Kit Includes:

• Forged Pro-Lite piston
• High-performance ring set for extended life and sustained power
• Alloy wrist pin (0.709 in. / 18mm diameter) — floating pin style
• 2 circlips
• Top-end gasket set

Key Specifications:

• Bore: 66.50mm (2.618 in.) — Standard
• Stroke: 63.00mm
• Wrist Pin Diameter: 0.709 in.
• Wrist Pin Style: Floating
• Piston Material: Forged aluminum
• Engine Type: 2-Stroke

Note: Top-end bearing is not included. Wiseco top end kits are sold by application and bore size — verify standard bore dimensions before ordering to ensure correct fitment.