Description

Complete Top End Rebuild Kit for Polaris Sportsman & Scrambler 850 (2014–2020)

If your Polaris Sportsman 850 is losing compression, burning oil, or showing signs of top-end wear, this complete top-end rebuild kit gives you what you need to fix it the right way. Instead of piecing parts together, this kit brings the key components into one package so you can rebuild with confidence.

This complete kit includes moly forged pistons, intake and exhaust valves, and a full top-end gasket kit. In addition, everything is built for proper fitment so installation goes smoothly. No core required. Built in the USA. Exact fitment verified.

What This Kit Includes

• Top-end gasket kit
• (2) Moly forged pistons
• (4) Intake valves
• (4) Exhaust valves

Technical Support & Build Guidance

Top-end work requires attention to detail, so always check clearances, valve seating, and ring gaps before final assembly. Proper installation helps restore compression and keeps your engine running strong.

If you’re comparing kit types, check out our engine rebuild kit guide to understand the differences between refresh, complete, and master kits.

You can also browse more Powersports engines and parts or find model-specific options here: Sportsman 850 parts and Scrambler 850 parts.

Warranty & Support

REV6 backs this kit with a 1-year warranty, so you can install it with confidence. Review full details on our warranty coverage. If you have questions, reach out through our contact page.

Fitment

Polaris Sportsman 850 (2014–2020)
Polaris Scrambler 850 (2014–2020)

Take Action

If your top end is worn out, now is the time to fix it before it leads to bigger engine problems. This complete kit gives you the parts to rebuild it right the first time. Order today and get fast, reliable nationwide shipping—no core required.