Wiseco 2376M07750 Pro-Lite Piston Kit Bore Oversize - 2-Stroke 77.50mm 1.50mm

The Wiseco 2376M07750 Pro-Lite Piston Kit is a forged 2-stroke oversize piston kit bored to 77.50mm (+1.50mm over standard), designed for Ski-Doo 582, 583, and 643 engine types. Built on decades of 2-stroke piston engineering, the Pro-Lite line delivers a proven balance of performance, reliability, and value for trail and racing applications alike.

Each piston is forged from 4032 high-silicon aluminum alloy using dedicated forgings that optimize the strength-to-weight ratio. CNC machining ensures a precise cam shape and skirt profile, contributing to peak horsepower, torque, and long service life. Extra lightening operations further enhance throttle response.

Key Features:

• Forged 4032 high-silicon aluminum alloy construction for maximum strength and durability
• CNC-machined cam shape and skirt profile for optimal power output and service life
• Dedicated forging design for superior strength-to-weight ratio
• Extra lightening operations for improved throttle response
• Horizontal slot-pin oiling reduces friction and provides scuff resistance
• Pressure seal groove for maximum ring seal
• Engineered, forged, and machined in the USA (Mentor, OH)
• Fits 582, 583, and 643 Ski-Doo engine types

Kit Includes: Piston, rings, wrist pin, and circlips — everything needed for a complete top-end rebuild. Note: This is an oversize piston (+1.50mm); cylinder boring or sleeving is required prior to installation.