Wiseco PK1587 91mm Top End Piston Kit for Honda CR480R/CR500R

The Wiseco PK1587 is a complete top end piston kit designed for the Honda CR480R and CR500R, featuring a 91mm (2mm overbore) forged Pro-Lite piston with a 6.8:1 compression ratio. This kit provides everything needed to properly rebuild or overbore the top end of these legendary two-stroke motocross engines in a single, convenient package.

Kit Includes:

• Forged Pro-Lite piston (91mm bore / 871M series)
• High-performance piston ring set
• Alloy wrist pin
• Circlips
• Complete top end gasket set

Key Features:

• Forged aerospace-alloy construction — dedicated forgings deliver a superior strength-to-weight ratio compared to cast pistons
• CNC machined Pro-Lite design — optimized cam shape and profile for peak horsepower and extended service life in two-stroke applications
• Precision crafted and forged in the USA at Wiseco's facility in Mentor, Ohio
• High-quality matched components — rings, pin, and gaskets are specifically chosen to pair with Wiseco's forged piston for a true one-stop rebuild solution
• 6.8:1 compression ratio — engineered for the CR480R/CR500R power characteristics

Wiseco PK-series top end kits are the trusted choice of professional race teams competing in Supercross, Motocross, and GNCC. The PK1587 delivers the same race-proven reliability and performance to the rebuild bench, making it the ideal solution for restoring full power and extending engine life in your Honda CR480R or CR500R.