Wiseco PK1488 ProLite Forged Piston Kit 89.50mm Honda CR500 1990-2001

The Wiseco PK1488 is a ProLite forged piston kit designed for the 1990–2001 Honda CR500 two-stroke motocross engine. Measuring 89.50mm (871M08950) in bore diameter, this kit delivers the strength and precision demanded by high-performance 2-stroke applications.

Key Features:

• USA-forged construction — all pistons are forged in-house using proprietary tooling, ensuring consistent quality and tight tolerances
• ProLite design — optimized strength-to-weight ratio for reduced reciprocating mass and improved throttle response
• Skirt coating — factory-applied skirt coating reduces friction and improves break-in performance
• Condensed grain structure — forged aluminum grain is aligned to part geometry, producing superior mechanical properties versus cast alternatives
• Impact and fatigue resistance — forged pistons withstand the shock loads and sustained abuse of aggressive off-road and racing use
• Top-end gasket kit included — complete kit provides everything needed for a top-end rebuild
• In-house dyno development — Wiseco's integrated design, testing, and manufacturing process validates real-world performance

Wiseco's forged pistons outperform cast alternatives by offering a denser grain structure that resists catastrophic failure when material yield strength is challenged — a critical advantage in high-compression, high-RPM 2-stroke racing engines. The PK1488 kit makes an ideal choice for a full top-end restoration or performance rebuild on the Honda CR500.

Specifications:

• Bore Diameter: 89.50mm
• Piston Code: 871M08950
• Engine Type: 2-Stroke
• Application: 1990–2001 Honda CR500
• Includes: Forged piston, rings, pin, clips, and top-end gasket kit