Wossner 8707DA Piston Kit - 2008-2012 KTM 450 EXC-R XC-W / Husaberg FE FX 450 Size A

Wossner 8707DA Standard Series Forged 4-Stroke Piston Kit - Standard Size A

Refresh the powerhouse of your European off-road machine with the Wossner 8707DA Piston Kit. Specifically engineered for the high-performance 450cc engines found in 2008-2012 KTM and Husaberg models, this Standard Series forged kit is the professional choice for restoring factory-spec power and reliability. At Moto-House MX, we know that 450cc riders demand consistent torque for everything from technical dual-sport trails to adventure touring; Wossner’s aerospace-grade forged components provide the precision and heat management needed to keep your engine running at its peak.

Forged from high-strength aluminum alloy, the 8707DA maintains a reliable 11.9:1 compression ratio, offering a perfect balance between aggressive power delivery and engine longevity. This kit features Wossner’s advanced radial boss machining and enhanced oiling slots for superior wrist pin lubrication—a vital feature for 4-stroke engines that endure long hours and high operating temperatures. The permanent skirt coating reduces internal friction and piston rock, resulting in a quieter running engine and a smooth break-in period. This Standard Size A piston (94.95mm) is precision-matched for 95.00mm bores, restoring your KTM or Husaberg to its original mechanical tolerances.

Top Features: Wossner 8707DA Piston Kit

• Standard Size A (94.95mm): Precision-engineered for 95.00mm bores to maintain factory-spec clearances and maximize engine life.
• 11.9:1 Compression Ratio: Designed to match original performance specifications for reliable power delivery and compatibility with high-quality fuel.
• Standard Series Forging: Significantly stronger and more resilient than OEM cast pistons, offering superior fatigue resistance for aggressive off-road and dual-sport riding.
• Enhanced Lubrication Design: Radial boss machining and specialized oiling slots ensure the wrist pin remains lubricated under intense mechanical stress.
• Low-Friction Skirt Coating: Permanent molybdenum disulphide coating protects cylinder walls and reduces internal drag.
• Complete Assembly: Kit includes the forged piston, high-performance rings, wrist pin, and pin locks.

Expert Pro-Tip: The KTM and Husaberg 450cc engines are renowned for their versatility, but they require precise internal tolerances to stay reliable. Size A is the ideal choice for a cylinder that is still within factory service limits or has been freshly replated. When performing a rebuild with the 8707DA, we recommend a thorough inspection of your cam chain tensioner and oil screens. Always use a fresh top-end gasket kit and premium synthetic oil to provide a professional-grade seal and protect your new forged assembly for miles of reliable adventure.

Fitment List

Year Range	Vehicle Brand	Vehicle Model
2008-2011	KTM	450 EXC-R / XC-W / Six Days / Champions Edition
2008-2009	KTM	450 XCR-W
2009-2012	Husaberg	FE 450 / FX 450

Frequently Asked Questions

Q: Is this a Standard Size piston?
A: Yes, this is the 94.95mm piston designed for the standard 95.00mm bore. It is the correct choice for cylinders that are new or within original factory service limits.

Q: Why choose Wossner for my KTM 450?
A: Wossner forged pistons are denser and more durable than stock cast parts. For 450cc engines used in dual-sport and off-road applications, a forged piston handles heat and mechanical stress more effectively, providing a higher safety margin during long rides.

Q: Does this kit include the gasket set?
A: No, the kit includes the forged piston, rings, wrist pin, and locks. A complete top-end gasket set is sold separately and is required for a professional engine rebuild.

Recommended Pairings

• Complete Top End Gasket Set: Ensure a professional, leak-free seal and proper engine compression.
• Motorex Cross Power 4T Oil: Premium synthetic lubrication specifically designed for high-performance KTM and Husaberg 4-stroke engines.

Restore your machine’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.