Wiseco SK1064 Top End Rebuild Kit 72.00mm Standard Bore Polaris 500 Fuji 2-Stroke Twin

The Wiseco SK1064 is a complete top end rebuild kit engineered for Polaris 500cc Fuji twin-cylinder 2-stroke snowmobile engines. Built around Wiseco's renowned forged piston technology, this kit delivers the strength, precision, and durability needed to restore factory performance or support high-output riding demands.

What's Included:

• (2) Wiseco forged aluminum pistons — standard 72.00mm bore
• (2) Ring sets
• Wrist pins and circlips
• Full top-end gasket set with .059" thick head gasket

Note: Top end bearings are not included.

Key Features:

• Forged aluminum construction — superior strength, heat resistance, and longevity compared to OEM cast pistons
• Standard 72.00mm bore — direct OEM-spec replacement requiring no additional machining or cylinder modification
• ArmorGlide skirt coating — reduces friction, allows tighter bore fitment, minimizes piston rock, and improves wear resistance
• CNC-machined to exact tolerances — consistent sizing across every component for reliable fitment and compression
• Closer wrist pin boss spacing — eliminates wrist pin flex for improved stability under load
• USA forged and manufactured — Wiseco forges all pistons and produces all forge tooling in-house, controlling quality from raw material to finished part

Wiseco's Pro-Lite forged 2-stroke pistons are the product of decades of snowmobile-specific R&D, including in-house dyno testing and continuous refinement of piston shape, coating technology, and component design. The SK1064 kit provides everything needed for a complete top end rebuild, making it an ideal solution for scheduled maintenance, engine restoration, or performance-focused rebuilds.