Wiseco PK1490 ProLite Forged Piston Kit 90mm Honda CR500 1990-2001

The Wiseco PK1490 is a ProLite forged piston kit designed for the 1990–2001 Honda CR500, featuring an 871M09000 bore size of 90.00mm. This kit includes a top-end gasket kit, giving you everything needed for a complete top-end refresh on your CR500 two-stroke engine.

Why Forged — Not Cast:

• Forged pistons feature a condensed, aligned grain structure that delivers superior mechanical strength compared to brittle cast alternatives
• Greater resistance to impact and fatigue under extreme racing loads
• Forgings maintain integrity when material yield limits are approached — cast pistons tend to fail catastrophically under the same conditions
• Optimized strength-to-weight ratio through purpose-engineered forging design

Wiseco ProLite Kit Features:

• 90.00mm (871M09000) bore diameter for the Honda CR500
• Forged entirely in-house in the USA — raw bar through finished skirt-coated part
• Precision skirt coating for reduced friction and improved ring seal
• Developed and validated via in-house dyno testing for real-world race performance
• Includes top-end gasket kit for a complete, convenient service solution
• Compatible with 2-stroke dirt bike applications demanding high-output durability

Wiseco controls every step of the manufacturing process — from forge tooling and raw material to final coating and distribution — ensuring consistent quality and minimal lead times. The PK1490 ProLite kit is the go-to choice for CR500 riders seeking a reliable, performance-proven piston replacement.