Wossner 8673DA Piston Kit - Yamaha Raptor 700 / Rhino 700 / Grizzly 700 Size A

Wossner 8673DA Pro Series Forged 4-Stroke Piston Kit - Standard Size A

Refresh the powerhouse of your Yamaha with the Wossner 8673DA Piston Kit. Engineered specifically for the high-torque 700cc powerplant found in the Yamaha Raptor 700, Grizzly 700, and Rhino 700 models (2006-2014), this Pro Series forged kit is the professional choice for maintaining factory-spec performance. At Moto-House MX, we understand that whether you are racing across dunes or hauling through trails, your engine deserves aerospace-grade components that offer superior strength and heat management over stock cast alternatives.

Forged from premium aluminum alloy, the 8673DA maintains a reliable 11.0:1 compression ratio, providing smooth, consistent torque and compatibility with quality fuel. This kit features Wossner’s Pro Series radial boss machining and enhanced oiling slots for superior wrist pin lubrication—a critical upgrade for the large-bore 102mm piston. The permanent skirt coating reduces internal friction and piston rock, leading to a quieter running engine and a more efficient break-in period. This Standard Size A piston (101.94mm) is precision-matched for 102.00mm bores, restoring your ATV or UTV to its original mechanical tolerances.

Top Features: Wossner 8673DA Piston Kit

• Standard Size A (101.94mm): Precision-engineered for 102.00mm bores to maintain factory-spec clearances and maximize engine life.
• 11.0:1 Compression Ratio: Matches original performance specifications for reliable power delivery and engine longevity.
• Pro Series Forged Construction: Denser and more resilient than stock cast pistons, offering superior fatigue resistance for high-load ATV and UTV applications.
• 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 Yamaha 700cc engine is a workhorse, but its large-bore design creates significant heat. 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 8673DA, we recommend a thorough inspection of the timing chain and oil pump. 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 riding.

Fitment List

Year Range	Vehicle Brand	Vehicle Model
2006-2014	Yamaha	Raptor 700 / 700R / SE / GYTR
2007-2013	Yamaha	Grizzly 700 FI 4x4 / EPS / SE / Ducks Unltd / Outdoorsman
2008-2013	Yamaha	Rhino 700 FI

Frequently Asked Questions

Q: Is this a Standard Size piston?
A: Yes, this is the 101.94mm piston designed for the standard 102.00mm bore. It is the correct choice for cylinders that are new or within original factory service limits.

Q: Why choose Wossner for my Yamaha 700?
A: Wossner forged pistons are significantly stronger than OEM cast parts. For large-bore engines like the Raptor or Grizzly, a forged piston handles the thermal and mechanical stresses much better, providing a higher safety margin during heavy use.

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 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.