WOSSNER K8897DA-2 Polaris RZR XP 900 Pro Series Forged Twin Piston Kit Standard A

Pro Series Forged Precision for Polaris RZR XP 900

Rebuild your RZR with the elite engineering of the WOSSNER K8897DA-2 Pro Series Piston Kit. Specifically designed for the high-revving Polaris RZR XP 900 parallel-twin engine, this Standard Size A (93mm) kit is for riders who demand the best in reliability and performance. Forged from aerospace-grade aluminum alloy, these pistons provide a major strength upgrade over stock cast parts, allowing your engine to handle the intense heat and stress of dunes, trails, and racing. Available now at Moto-House MX, this kit is the professional's choice for a factory-spec top-end restoration that lasts.

The technical superiority of the K8897DA-2 lies in its Pro Series design. Each piston features enhanced pin oiling slots and radial boss machining, ensuring consistent wrist pin lubrication during high-RPM operation. To minimize drag, the skirts are treated with a specialized dry-film coating that reduces friction and engine noise while improving the critical break-in process. With a 11.0:1 compression ratio and tight piston-to-wall clearances, you’ll experience smooth, efficient power delivery across the entire powerband. This twin-cylinder kit is fully inclusive, containing two forged pistons, rings, wrist pins, and pin locks for a seamless professional installation.

Top Features: WOSSNER K8897DA-2 Pro Series Kit

• Twin-Cylinder Pro Series Set: includes two high-strength forged pistons balanced for the Polaris 900cc twin-engine platform.
• Standard Size A (92.95mm Piston): Precision-tailored for 93.00mm cylinders that are brand new or freshly replated to factory specs.
• Advanced Lubrication Tech: Radial boss machining and annular grooves optimize oil flow to the wrist pins under racing conditions.
• Performance Skirt Coating: Advanced anti-friction treatment ensures a quieter running engine and improved break-in durability.
• High-Efficiency Compression: 11.0:1 ratio provides consistent power while maintaining reliability for long-distance off-road riding.

Expert Pro-Tip

When installing this Pro Series kit in your RZR 900, always use a precision feeler gauge to verify your ring end gaps. Maintaining the exact Wossner-specified gap is essential for preventing ring expansion issues in high-heat 4-stroke applications.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2011-2014	Polaris	RZR XP 900 EFI / LE / EPS 4x4
2012-2013	Polaris	RZR 4 XP 900 EFI / EPS 4x4

Frequently Asked Questions

Q: Is this a big bore kit or a standard replacement?
A: This is a Standard Size A replacement (93.00mm bore), designed to fit original or replated factory cylinders without boring.

Q: What is the difference between Pro Series and Standard Series?
A: Pro Series pistons often feature specialized machining for weight reduction and enhanced lubrication, making them ideal for high-performance use.

Q: Do I need to buy two kits for my RZR 900?
A: No, the "K" prefix and "-2" suffix confirm that this kit contains both pistons and all hardware required for your twin-cylinder engine.

Recommended Pairings: Polaris XP 900 Top-End Gasket Kit, High-Performance Cam Chain, and Synthetic 4-Stroke UTV Engine Oil.

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