Wossner K8825DA-2 Piston Kit - Polaris Sportsman Ranger 700 EFI Twin Size A

Wossner K8825DA-2 Standard Series Forged 4-Stroke Piston Kit - Standard Size A

Restore the legendary reliability and torque of your Polaris utility machine with the Wossner K8825DA-2 Piston Kit. Specifically engineered for the Polaris 700 Twin engine found in the Sportsman and Ranger series, this Standard Size A forged kit is the professional choice for riders performing a top-end rebuild on stock 80.00mm bores. At Moto-House MX, we understand that these ATVs and UTVs are workhorses; Wossner’s forged aluminum construction provides a significant upgrade in strength over factory cast pistons, ensuring your vehicle can handle the heavy loads and demanding terrain of the farm or trail.

The K8825DA-2 is designed for longevity and smooth operation, featuring a 9.8:1 compression ratio that perfectly matches factory specifications for reliable performance on standard pump gas. To protect your engine during long work days, Wossner has integrated enhanced piston pin oiling slots and radial boss machining for superior wrist pin lubrication. The piston skirt is treated with a permanent coating to reduce friction and minimize "piston slap," resulting in a quieter running engine and a more efficient break-in. Precision-machined for 80.00mm bores, this 79.93mm kit is the ultimate solution for refreshing your Polaris 700.

Top Features: Wossner K8825DA-2 Piston Kit

• Standard Size A (79.93mm): Precision-machined for factory 80.00mm bores to maintain ideal piston-to-wall clearances.
• Forged Strength: Crafted from aerospace-grade aluminum alloy, offering superior heat resistance and durability compared to original cast pistons.
• Enhanced Lubrication System: Features specialized oiling slots and annular grooves to ensure consistent wrist pin lubrication under heavy workloads.
• Low-Friction Skirt Coating: Permanent skirt treatment reduces internal drag and wear, contributing to a quieter and longer-lasting engine life.
• Reliable 9.8:1 Compression: Maintains stock compression levels for dependable power delivery and easy starting.
• Complete Kit: Includes the high-performance forged Size A piston, rings, wrist pin, and pin locks.

Expert Pro-Tip: The Polaris 700 Twin is a robust engine, but internal wear is inevitable after years of service. If you are refreshing a relatively new cylinder or one that has been well-maintained, the Size A (79.93mm) is the correct choice to stay within factory tolerances. Always use a precision bore gauge to confirm your cylinder measures 80.00mm before installation. For a professional-grade rebuild, we recommend replacing your gaskets and inspecting your oil pump to ensure your new forged assembly receives maximum protection.

Fitment List

Year Range	Vehicle Brand	Vehicle Model
2002-2006	Polaris	Sportsman 700 / 700 Twin / EFI
2005-2009	Polaris	Ranger 700 / 4x4 / 6x6 / EFI
2009	Polaris	Ranger HD 700
2002-2009	Polaris	Sportsman 700 MV / MV7
2003-2008	Polaris	Sportsman / Ranger Special Editions

Frequently Asked Questions

Q: Is this piston an upgrade over the stock Polaris piston?
A: Yes. While the stock pistons are typically cast, Wossner pistons are forged. Forging creates a much denser and stronger grain structure, allowing the piston to better withstand the heat and mechanical stress of high-torque utility work.

Q: Do I need to re-jet or re-map my EFI for this piston?
A: No. Because this piston maintains the standard 9.8:1 compression ratio and Size A dimensions, it is designed to work seamlessly with your factory fuel settings.

Q: What is the benefit of the skirt coating?
A: The coating reduces friction between the piston and the cylinder wall. This not only helps during the critical break-in period but also reduces engine noise and extends the life of the cylinder bore.

Recommended Pairings

• Complete Engine Gasket Kit: Essential for ensuring a leak-free seal on your Polaris Twin engine during the rebuild.
• High-Quality Engine Oil: Ensure your new forged pistons are protected with a premium oil designed for high-stress ATV/UTV environments.

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.