Wiseco 577M08050 Forged Piston Kit Bore Oversize - 2-Stroke 80.50mm 0.50mm

The Wiseco 577M08050 is a 2-stroke forged piston kit featuring an 80.50mm bore diameter — a 0.50mm oversize — engineered specifically for the Honda FL400R Pilot ATV. Forged, machined, and engineered in the USA at Wiseco's facility in Mentor, Ohio, this piston kit reflects over 80 years of 2-stroke piston development and manufacturing expertise.

Wiseco's dedicated forgings deliver an optimized strength-to-weight ratio through precision lightening operations, resulting in a lightweight piston that delivers instant throttle response and reduced rotating mass. Computer-engineered skirt profiles minimize cylinder-wall friction, while anti-detonation grooves and precision ring land geometry work together to eliminate ring blow-by and maximize engine performance.

Key Features:

• Forged from high-strength aluminum alloy with improved tensile strength for superior durability and service life
• Dedicated forging design optimizes strength-to-weight ratio for maximum performance
• Computer-engineered piston skirt profile minimizes cylinder-wall friction
• Anti-detonation grooves and precision ring land design eliminate ring blow-by
• Engineered, forged, and machined in the USA in Mentor, OH
• Designed and built specifically for the 2-stroke powersports engine application

Kit Includes:

• Forged piston (80.50mm bore — 0.50mm oversize)
• High-quality piston ring(s)
• Wrist pin
• Circlips

Whether refreshing a worn cylinder or rebuilding after a bore, the Wiseco 577M08050 piston kit delivers the performance and reliability Wiseco has built its reputation on across decades of powersports competition.