Wossner K8930D500-2 Piston Kit - 2013-2025 Polaris RZR Ranger 900 1000 UTV ATV

Wossner K8930D500-2 Pro Series Forged Piston Kit

When it is time to push your Polaris to the next level, the Wossner K8930D500-2 Piston Kit delivers the high-compression power and reliability required for aggressive riding. This Pro Series kit features a 5.00mm oversize bore, making it the ultimate choice for riders performing a big-bore top-end rebuild. Whether you are navigating tight trails or wide-open dunes, Moto-House MX provides the precision-engineered components needed to keep your UTV or ATV performing at its peak.

Forged from premium aerospace-grade aluminum alloy, these pistons offer Factory Quality strength and a lightweight design for a quieter, more efficient engine. The skirts are professionally coated to reduce friction and ensure a smooth break-in period, while enhanced oiling slots and annular grooves provide superior lubrication to the wrist pin. Works Great with most Polaris UTV and ATV high-displacement engines, this kit is engineered for improved ring seal and maximum oil control under extreme heat and pressure.

Top Features: Wossner K8930D500-2 Piston Kit

• Double Bridged Forging: Advanced design for maximum structural integrity in high-load environments.
• Low-Friction Skirt Coating: Reduces internal resistance and improves engine longevity.
• Enhanced Piston Oiling: Precision slots and grooves for optimized wrist pin lubrication.
• Pro Series Ring Treatment: Specialized ring land treatment for superior compression seal.
• Complete Rebuild Kit: Includes forged piston, high-performance rings, wrist pin, and pin locks.

Expert Pro-Tip: When installing an oversize piston kit, always verify your cylinder bore clearance and ensure you are using a high-quality torque wrench to meet Polaris factory specifications for head bolts.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2014-2025	Polaris	RZR XP 1000 (All Models)
2017-2025	Polaris	Ranger XP 1000 (All Models)
2016-2022	Polaris	General 1000 (All Models)
2015-2024	Polaris	RZR 900 / Trail S 900
2013-2019	Polaris	Ranger 900 XP
2016-2019	Polaris	ACE 900 XC / SP

Frequently Asked Questions

Q: Is this a big bore kit?
A: Yes, this kit features a 5.00mm oversize (98.00mm bore), which requires specific cylinder machining or a matching big bore cylinder.

Q: Does this kit include everything for the top end?
A: It includes the piston, rings, pin, and clips. We recommend pairing this with a top-end gasket kit for a complete seal.

Q: Is the skirt coating permanent?
A: The coating is designed to assist with the critical break-in period and reduce long-term friction, though it is subject to normal engine wear over time.

Recommended Pairings

• Cometic Top End Gasket Kit: Essential for sealing your big bore cylinder head.
• Heavy Duty Connecting Rods: Recommended to handle the increased power of a 5.00mm oversize piston.

Upgrade your Polaris today for unmatched power and durability. 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.