Wiseco SK1328 Standard Bore Forged Piston Kit - 2-Stroke 79.70mm

The Wiseco SK1328 is a standard bore, 2-stroke forged piston kit with a 79.70mm bore diameter, purpose-built for high-performance snowmobile applications. Designed specifically for snocross and cross-country racing demands, this kit delivers the strength, durability, and precision that serious riders require.

What's Included:

• Forged piston (79.70mm standard bore)
• High-performance ring kit
• Alloy wrist pin
• Circlips

Key Features:

• USA-forged construction — Wiseco forges all pistons and forge tooling in-house in the USA, controlling every step from raw material to finished part
• High silicon, low expansion aluminum alloy — delivers superior strength, reduced weight, improved heat transfer, and extended service life
• Condensed grain structure — the forging process aligns grain flow to part geometry, producing higher mechanical properties and superior resistance to impact and fatigue versus cast alternatives
• Hard coat anodize treatment — provides enhanced wear resistance and surface hardness
• Race-proven design — developed with input from top snocross race teams and validated through in-house dyno testing
• CNC machined Pro-Lite profile — optimized cam shape for peak horsepower output and long service life

Specifications:

• Bore Size: 79.70mm (Standard)
• Stroke: 70.00mm
• Displacement: 698cc
• Cylinders: 2
• Surface Treatment: Hard Coat Anodize
• OEM Cross-Reference: 09030594
• Alternate Part Number: 2410M07970

Wiseco's complete top-end piston kits include all matched components in a single package, eliminating guesswork and ensuring proper fit the first time. Unlike brittle cast pistons that risk catastrophic failure under high stress, Wiseco's forged design maintains structural integrity even under the most extreme racing conditions.