Wiseco Piston Kit 49.50 mm Bore Honda XR80 1979-1984 4665M04950

Stock pistons in your Honda XR80 will eventually reach their limits—especially if you're running aggressive ignition timing or pushing RPMs in competitive settings. The Wiseco Piston Kit 49.50 mm delivers the strength and precision engineering required to handle high-load conditions while maintaining the reliability you need for consistent performance. Whether you're rebuilding after wear or upgrading for competition, this kit ensures your engine can deliver power without compromise.

Wiseco pistons are forged from high-silicon, low-expansion aluminum—a material choice that resists thermal stress and maintains tight tolerances even under sustained heat. The optimized dome design promotes efficient combustion flow and improves power delivery across the RPM band. Installation is straightforward for experienced mechanics, and the kit arrives complete with rings and pins, everything you need for a full top-end rebuild.

• Bore diameter: 49.50 mm
• Material: High-silicon aluminum alloy
• Construction: Forged, precision-engineered
• Fitment: Honda XR80 (1979-1984)
• Also fits: Honda XR80R, CRF80F models
• Includes: Piston, rings, wrist pin
• Installation: Bolt-on rebuild (top-end)
• Low expansion rate
• Optimized combustion chamber design