Wiseco SK1261 71mm 2-Stroke Pro-Lite Forged Piston Kit for Arctic Cat Snowmobile

The Wiseco SK1261 is a 71.00mm 2-stroke Pro-Lite forged piston kit engineered specifically for Arctic Cat snowmobiles, including the ZR 500, ZL 500, ZL 500 EFI, Powder Special 500 EFI, and Powder Special 500 EFI Limited. Designed and manufactured entirely in the USA, this kit delivers the strength, precision, and reliability demanded by snocross and cross-country racing applications.

The Pro-Lite piston is CNC machined for an optimal cam shape and profile, maximizing horsepower output and service life. Wiseco forges all of their own pistons and forge tooling in-house at their Mentor, Ohio facility, giving them complete control over the manufacturing process from raw bar stock through finished skirt coating.

Key Features:

• 71.00mm bore diameter — designed for stock bore Arctic Cat 500cc 2-stroke engines
• Pro-Lite forged construction — CNC machined for optimized cam profile and peak power
• Race-ready dome finish with smooth edges for improved combustion flow
• Forged grain structure — condensed and aligned to part geometry for superior mechanical properties, impact resistance, and fatigue life versus cast alternatives
• Optimized strength-to-weight ratio — dedicated forgings with targeted lightening operations
• Complete kit — includes forged piston, Wiseco rings, wrist pin, and circlips; top-end gasket set also included
• USA engineered, forged, and machined — Wiseco controls every stage of production for consistent quality

Wiseco rings are manufactured to match Wiseco pistons and are not interchangeable with other brands. This kit provides a more durable, performance-focused alternative to OEM cast pistons, making it an ideal choice for riders rebuilding a high-performance top end.