Description

Rebuild the Power Your Polaris Snowmobile Deserves

The Polaris Pro RMK 800 Top End Rebuild Kit gives your 2011–2015 snowmobile the key components needed to restore compression, throttle response, and reliability. Designed for riders who push through deep powder, this rebuild kit ensures your Liberty engine performs as strong as it did from the factory—only better.

This Kit Includes

• (2) Moly coated cast piston kits
• (1) Top-end gasket set
• (2) Wrist-pin needle bearings

Fitment Information

• 2011–2015 Polaris Pro RMK 800 snowmobile (all models)

Engine Specs & Performance Notes

The Polaris 800 RMK models from 2011–2015 use a 795 cc, liquid-cooled, two-stroke Liberty engine with Cleanfire fuel injection. It features an 85 mm bore and 70 mm stroke with a single SC VES exhaust. The Digital CDI ignition with TPS, WTS, and DET delivers consistent spark and responsive throttle. This engine was engineered for a high power-to-weight ratio, making it one of the most capable Polaris snowmobile platforms for mountain and deep-snow performance.

Built for Performance

Forged moly pistons handle extreme RPM and temperature swings. The premium top-end gasket kit maintains tight compression, and the precision wrist-pin needle bearings minimize friction for smooth operation. As a result, your RMK 800 runs cooler, revs faster, and pulls harder in any snow condition.

Backed by Warranty

All REV6 rebuild kits are backed by a standard 1-year warranty.

Installation & Support

Installation is simple for experienced builders. Clean mating surfaces, torque to spec, and follow proper break-in. For extra help, visit our Help Center or FAQ, or Contact Us directly. Explore our REV6 Blog for tips and tutorials, or watch install videos on the REV6 YouTube channel. If you’re comparing options, check our Engine Rebuild Kit Guide.

Thank you for choosing REV6 — your trusted source for high-performance powersports engines and parts. We proudly support U.S. veterans and servicemembers with exclusive discounts as our way of giving back to those who serve.