Wiseco 2-Stroke Piston Kit 47.5mm Honda CR85R 2003-2007 RE921M04750

If you're running a CR85R hard, piston wear is inevitable—and factory replacements won't keep pace with aggressive riding or modified engines. The Wiseco RE921M04750 delivers the durability and precision tolerance you need to maintain peak compression, throttle response, and engine longevity. This is a complete, ready-to-install solution engineered specifically for 2003-2007 Honda CR85R models.

Built from 2000 Series forged alloy and finished with ArmorPlating technology, this piston kit resists detonation damage and ring blow-by—critical factors in 2-stroke performance where ring seal directly affects power delivery. The optimized skirt coating reduces friction losses, keeping temperatures down and responsiveness up, whether you're hitting the track or pushing hard on technical terrain.

• Fitment: Honda CR85R 2003-2007
• Bore diameter: 47.5mm
• Material: 2000 Series alloy
• Includes: Piston, rings, wrist pin, circlips
• ArmorPlating: Detonation and wear resistant
• Skirt coating: Low-friction design
• Installation: Bolt-on replacement
• MPN: RE921M04750