Wossner 4086DA Piston Kit - 2023-2026 Yamaha YZ450F WR450F YZ450FX Motocross

Wossner 4086DA Pro Series Forged Piston Kit

When your high-performance 450cc engine demands a top-end refresh, the Wossner 4086DA Piston Kit is the definitive choice for restoring compression and Factory Quality throttle response. Engineered specifically for the latest generation of Yamaha powerplants, this kit ensures your machine maintains its competitive edge on the track or the trail. At Moto-House MX, we provide the precision-forged components that champions rely on for consistent, rugged performance.

Forged from aerospace-grade aluminum alloy, this Pro Series piston is designed for extreme lightness without sacrificing structural strength in critical areas like the crown and skirt walls. The permanent skirt coating reduces friction and piston rock, resulting in a quieter engine and smoother power delivery across the RPM range. Designed to withstand the high-intensity environment of a 13.5:1 compression ratio, this kit provides the durability needed for professional-grade off-road racing.

Top Features: Wossner 4086DA Piston Kit

• Aerospace Forged Alloy: Premium aluminum construction for superior heat resistance and strength.
• Permanent Skirt Coating: Minimizes friction and wear for a quieter running engine and faster break-in.
• Pro Series Machining: Optimized for weight savings while maintaining maximum integrity in high-stress zones.
• Three-Ring Design: Provides exceptional oil control and a reliable combustion seal for 4-stroke performance.
• Complete Assembly: Kit includes the forged piston, high-quality rings, wrist pin, and clips.

Expert Pro-Tip: When rebuilding your Yamaha 450 engine, always use a new top-end gasket kit and verify that the cylinder bore is within factory service limits for a 97.00mm standard size piston.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2023-2026	Yamaha	YZ450F
2024-2025	Yamaha	WR450F
2024-2025	Yamaha	YZ450FX

Frequently Asked Questions

Q: Is this a Standard Size piston?
A: Yes, this is a Standard Size A (96.96mm) piston designed for the stock 97.00mm Yamaha bore.

Q: What compression ratio does this piston provide?
A: This kit is designed for a 13.5:1 compression ratio, matching the high-performance requirements of modern 450cc motocross engines.

Q: Does this kit fit the older YZ450F models?
A: No, this specific kit is optimized for the updated engine platform found in the 2023-2026 YZ450F and 2024+ WR/FX models.

Recommended Pairings

• Vertex Top End Gasket Kit: Essential for a leak-free seal during your top-end rebuild.
• Yamalube 4-Stroke Engine Oil: Keep your new forged piston lubricated with factory-recommended fluids.

Don't let a worn piston slow you down. Restore your Yamaha's power today. Buy now at Moto-House MX!

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida. Stop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.