Wossner 4093DA Piston Kit - 2023-2026 Yamaha YZ450F WR450F YZ450FX

Wossner 4093DA Pro Series Forged Piston Kit

When your high-output Yamaha 450 engine requires a top-end refresh, the Wossner 4093DA Piston Kit is the definitive choice for restoring Factory Quality performance. Engineered for the latest generation of Yamaha YZ450F, WR450F, and YZ450FX powerplants, this Pro Series kit is designed to handle the extreme cylinder pressures and high-RPM demands of professional motocross and cross-country racing. At Moto-House MX, we provide the precision-forged components required to keep your Yamaha at the front of the pack.

Forged from aerospace-grade aluminum alloy, this piston features a gas-ported two-ring design that utilizes combustion pressure to force the rings against the cylinder wall for a superior seal and maximum horsepower. The permanent skirt coating significantly reduces friction and piston rock, resulting in a quieter engine and improved mechanical efficiency. Optimized for a 13.5:1 compression ratio, the 4093DA balances explosive power with the structural integrity needed for long-term racing reliability.

Top Features: Wossner 4093DA Piston Kit

• Aerospace Forged Alloy: Superior strength and heat resistance for the high-RPM Yamaha 450 engine.
• Gas Ported Two-Ring Design: Maximizes ring seal for increased compression and consistent power delivery.
• Low-Friction Skirt Coating: Permanent coating reduces wear and engine noise for smoother operation.
• Pro Series Lightweight Machining: Maintains structural strength while reducing reciprocating mass for faster revs.
• Complete Kit: Includes everything needed for a rebuild: forged piston, rings, wrist pin, and clips.

Expert Pro-Tip: The updated Yamaha 450 engine platform is a masterpiece of engineering but requires precise maintenance. When installing your new Wossner piston, always use a new top-end gasket kit and verify your valve clearances to ensure a perfect rebuild and long-term durability.

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 direct replacement for the stock Yamaha piston?
A: Yes, this is a Standard Size A (96.96mm) piston designed to fit the stock 97.00mm bore perfectly as a high-performance replacement.

Q: What are the benefits of gas ports in this Pro Series piston?
A: Gas ports allow combustion gases to reach behind the top ring, forcing it outward for a much better seal against the cylinder wall than standard pistons, resulting in more power and less blow-by.

Q: Will this fit my 2022 or older YZ450F?
A: No, this specific kit is engineered for the updated engine platform found in the 2023-2026 YZ450F and 2024+ WR/FX models.

Recommended Pairings

• Top End Gasket Kit: Essential for ensuring a leak-free seal during your Yamaha engine rebuild.
• Motorex 4-Stroke Engine Oil: Premium synthetic protection for high-performance forged pistons.

Restore your Yamaha's racing 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.