Wossner 8329DA Piston Kit - 2003-2018 KTM 105 SX XC Husqvarna TC 85 Big Bore

Wossner 8329DA Premium Forged 2-Stroke Piston Kit - 105cc Big Bore

When you are pushing the limits of your mini-racer, the Wossner 8329DA Piston Kit provides the Factory Quality reliability needed to stay ahead of the competition. Engineered specifically for the KTM 105cc engine and Husqvarna TC 85 Big Bore conversions, this kit is designed to restore lost compression and provide the crisp throttle response required for motocross racing. At Moto-House MX, we specialize in high-performance components that give young champions a mechanical advantage.

Forged from aerospace-grade aluminum alloy, this piston offers a superior strength-to-weight ratio, allowing for high-RPM stability without sacrificing durability. The permanent skirt coating is a critical feature, significantly reducing internal friction and piston rock for a quieter engine and smoother power delivery. With optimized machining that balances lightness and structural integrity, the 8329DA is built to withstand the intense heat and pressures of competitive 2-stroke racing.

Top Features: Wossner 8329DA Piston Kit

• Aerospace Forged Alloy: Premium aluminum construction for maximum heat resistance and structural strength.
• Low-Friction Skirt Coating: Permanent coating reduces wear and engine noise, ensuring a more efficient engine.
• Big Bore Optimized: Precision machined to a 51.95mm piston size for a perfect fit in 52.00mm bores.
• Dual-Ring Design: Provides an exceptional combustion seal and consistent power throughout the RPM range.
• Complete Kit: Includes everything needed for a top-end refresh: forged piston, rings, wrist pin, and clips.

Expert Pro-Tip: For 105cc Big Bore engines, cooling and lubrication are vital. Always verify your jetting is correct for the increased displacement and use a new top-end gasket kit during installation to ensure a leak-free seal.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2003-2018	KTM	105 SX
2008-2009	KTM	105 XC
2018	KTM	85 SX (Big Bore Conversion)
2018-2019	Husqvarna	TC 85 (Big Bore Conversion)

Frequently Asked Questions

Q: Is this a Standard Size piston for the 105cc model?
A: Yes, this is the 51.95mm piston designed for the standard 52.00mm bore size of the KTM 105cc engine and associated Big Bore kits.

Q: Can I use this in my standard 85cc cylinder?
A: No, this is for 105cc applications with a 52mm bore. A standard 85cc cylinder requires a smaller 47mm piston.

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 when performing a rebuild.

Recommended Pairings

• Top End Gasket Kit: Essential for a professional and reliable engine rebuild.
• Motorex Cross Power 2T Oil: The ultimate synthetic lubrication for high-revving 2-stroke racing engines.

Restore your racer’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.