Wossner Piston Kit 96.96 mm Yamaha YZ450F 2023-2025 4092DA

Stock pistons in your YZ450F are engineered for durability, not peak performance—and they show it through higher operating temperatures and reduced power output. The Wossner 96.96 mm Piston Kit replaces factory internals with aerospace-grade forgings that run cooler, reduce friction losses, and deliver measurable gains in throttle response and sustained power delivery. If you're serious about keeping your bike competitive on the track or trail, this is the upgrade that actually delivers.

This complete kit includes everything needed for a straightforward top-end rebuild: the piston itself features a permanent skirt coating that cuts friction and mechanical noise, precision-machined ring grooves that minimize blow-by, and optimized weight reduction in non-critical areas to lower reciprocating mass. The included rings, wrist pin, and clips are engineered as a matched system, ensuring proper clearances and longevity right out of the box.

• 96.96 mm bore diameter
• Yamaha YZ450F 2023–2025
• Aerospace-grade aluminum alloy
• Forged construction
• Permanent skirt coating
• Includes rings, pin, clips
• Bolt-on installation
• Reduced friction design
• Lower operating temperatures
• Wossner OEM part 4092DA