Cylinder Works Big Bore Cylinder Kit (98.00mm) 61001-K01 - Polaris RZR 900 / RZR XP 900 2011-2014

Product Description

The Cylinder Works Big Bore Cylinder Kit provides a massive performance boost for your Polaris RZR 900, increasing displacement to a commanding 971cc. Designed as a ready-to-install, direct bolt-on upgrade, this USA-made kit delivers significant power gains without requiring any specialized machine work to your engine cases, dropping right in to completely transform your ride.

Engineered for lasting durability under heavy loads, the cylinder features a premium Nickel Silicon Carbide plated bore for superior wear resistance, excellent heat dissipation, and reduced friction. It comes fully equipped with a perfectly matched Vertex piston (10.6:1 compression ratio) to ensure maximum longevity, robust power delivery, and reduced engine noise, giving your UTV reliable performance on the toughest trails.

Top Features: Cylinder Works Big Bore Kit

• Complete kit includes the cylinder, matched Vertex piston, rings, wrist pin, clips, and top-end gaskets.
• Increases engine displacement to 971cc with a +5.00mm oversize bore (98.00mm) and 10.6:1 compression ratio.
• Direct bolt-on design does not require any custom machine work or re-plating.
• High-quality Nickel Silicon Carbide plating ensures long cylinder life and consistent performance.
• Proudly made in the USA for uncompromising quality.

Please review the detailed compatibility data below to ensure an exact fitment match for your UTV before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Does this kit require me to bore out my engine cases?
A: No, this big bore cylinder is engineered as a direct bolt-on installation and does not require any additional machine work to fit your Polaris.

Q: Are the top-end gaskets included in this kit?
A: Yes, the kit comes completely ready to install with all necessary gaskets, the cylinder, matched piston, rings, pin, and clips.

Expert Pro-Tip: Always check your ring end gap before final assembly, even with pre-matched kits. Furthermore, take your time to properly break in the new cylinder and piston by going through several careful heat cycles before hitting wide-open throttle to ensure the rings seat perfectly.

Recommended Pairings:

• Polaris UTV Parts & Accessories
• Engine Rebuild Kits
• Premium Motorcycle Chemicals

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