Description
A worn or damaged piston directly undermines engine efficiency, reliability, and rideability—especially critical in the demanding environment of two-stroke racing. The Wossner 47.47mm Piston Kit delivers OEM-equivalent fitment with measurable improvements in friction reduction and thermal stability, allowing you to extract consistent power without premature wear. Whether you’re rebuilding after a season or upgrading your YZ85’s internals, this complete kit provides everything needed for a professional-grade top-end refresh.
Technical Specifications:
- Bore Diameter: 47.47mm
- Material: Aerospace-grade aluminum
- Skirt Coating: Permanent friction-reducing
- Fitment: Yamaha YZ85 2002–2025
- Kit Contents: Piston, rings, pin, clips
- Design: Lightweight, optimized machining
- MPN: 8330DC
- Installation: Bolt-on top-end replacement
- Performance Benefit: Reduced piston rock, quieter operation
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