Wossner 8331DA Piston Kit - 2022-2026 Yamaha YZ125 YZ125X 2-Stroke

Wossner 8331DA Premium Forged 2-Stroke Piston Kit

Keep your high-revving Yamaha 125 at the front of the pack with the Wossner 8331DA Piston Kit. Engineered specifically for the updated 2022-2026 engine platform, this kit is designed to restore Factory Quality power and the crisp throttle response required for competitive racing. Whether you are screaming around a motocross track on a YZ125 or navigating technical woods on a YZ125X, Moto-House MX provides the precision-forged components needed to maintain peak performance.

Forged from aerospace-grade aluminum alloy, this piston offers superior structural integrity and heat resistance, allowing it to withstand the extreme RPMs characteristic of the Yamaha 125cc powerhouse. The permanent skirt coating is a critical feature, reducing internal friction and piston rock for a quieter engine and improved mechanical longevity. Optimized machining ensures the piston is lightweight for rapid acceleration while maintaining maximum strength in high-stress areas like the crown and skirt walls.

Top Features: Wossner 8331DA Piston Kit

• Aerospace Forged Alloy: Premium aluminum construction for maximum durability and thermal stability at high RPMs.
• Low-Friction Skirt Coating: Permanent coating reduces wear and engine noise for smoother 2-stroke operation.
• Dual-Ring Design: Optimized for an exceptional combustion seal and consistent power throughout the powerband.
• Precision Machining: Lightweight design reduces reciprocating mass for faster revving and improved response.
• Complete Assembly: Includes everything needed for a top-end refresh: forged piston, rings, wrist pin, and clips.

Expert Pro-Tip: The 2022+ Yamaha 125 engine is a high-performance machine that requires precise top-end maintenance. When installing your new Wossner piston, always verify your ring end gap and use a new top-end gasket kit to ensure a perfect seal and long-term reliability.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2022-2026	Yamaha	YZ125 / Monster Energy Edition
2023-2026	Yamaha	YZ125X (Off-Road)

Frequently Asked Questions

Q: Is this a Standard Size A piston?
A: Yes, this is the 53.95mm piston designed for the standard 54.00mm bore size found in the 2022-2026 Yamaha YZ125 series.

Q: Does this kit include the wrist pin bearing?
A: No, the kit includes the piston, rings, wrist pin, and clips. We highly recommend purchasing a new small-end bearing separately for every top-end rebuild.

Q: Will this fit my 2021 or older Yamaha YZ125?
A: No, this specific kit is designed for the updated engine platform introduced in 2022. Older models require a different Wossner part number.

Recommended Pairings

• Top End Gasket Kit: Essential for a leak-free seal during your Yamaha engine rebuild.
• Motorex Cross Power 2T Oil: The ultimate synthetic lubrication choice for high-performance 125cc 2-strokes.

Restore your Yamaha’s power and precision 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.