Wiseco SK1123 Pro-Lite Forged Snowmobile Piston Kit - 67.72mm 2-Stroke

The Wiseco SK1123 Pro-Lite is a standard bore 67.72mm forged 2-stroke piston kit built for high-performance snowmobile engines. Engineered and manufactured entirely in the USA, this kit delivers the strength and precision demanded by serious snocross and cross-country riders.

Wiseco forges all of its own pistons in-house using high-silicon aerospace-grade aluminum bar stock, giving the SK1123 superior strength, lower thermal expansion at operating temperatures, and a tighter, more consistent fit than cast alternatives. Every step of the manufacturing process — from raw material to skirt coating — is controlled under one roof, ensuring uncompromising quality and tight tolerances.

Why Forged Over Cast?

• Forged pistons feature condensed, aligned grain structure that dramatically improves mechanical properties
• Greater resistance to impact, fatigue, and catastrophic failure under extreme loads
• Optimized strength-to-weight ratio for maximum performance without added mass
• Cast pistons are brittle with no grain structure and tend to fail suddenly when material limits are exceeded

Kit Includes:

• Forged high-silicon aluminum piston
• Piston ring(s)
• Wrist pin
• Circlips
• Top-end gasket set

Key Specifications:

• Bore Size: 67.72mm (Standard Bore)
• Engine Type: 2-Stroke / Fuji-type engine
• Series: Pro-Lite
• MPN: SK1123

Important: Wiseco piston rings are not interchangeable between ring types (e.g., CD rings are not interchangeable with LC rings) and must only be used with Wiseco pistons. Cylinder bore must be properly sized and honed to match the piston before installation.