Description

Polaris RZR 900 Master Engine Rebuild Kit with OEM Crank Cases (2017–2024)

This Master Engine Rebuild Kit with Crank Cases fits Polaris RZR 900 models from 2017–2024. Designed for complete engine builds, this package includes OEM crank cases along with upgraded rotating assembly and valvetrain components to restore strength, reliability, and long-term performance.

What This Kit Includes

• OEM Crank Case
• HD Twin Crankshaft
• Cylinder
• Crankshaft Main Bearings
• Balance Shaft Bearings
• Complete Gasket & Seal Kit
• Timing Chain
• Oil Pump Chain
• (2) Forged Connecting Rods
• (2) Moly Upgraded Pistons
• (4) Intake Valves
• (4) Exhaust Valves

First, the OEM crank cases provide a solid base for a proper rebuild. Next, the HD twin crankshaft and forged rods strengthen the rotating assembly. In addition, new bearings and upgraded pistons stabilize compression and oil control. Finally, replacing timing components and valves ensures proper airflow and accurate valve timing. As a result, your RZR 900 engine is rebuilt from the cases up.

Build Guidance & Technical Support

Before assembly, review our Polaris Crankshaft Bearing Mapping Guide to confirm proper bearing sizing. In addition, our REV6 Piston & Ring Installation Guide walks through the correct piston setup. If you’re looking to maximize performance after the build, learn how calibration improves reliability in our UTV & ATV ECU Tuning Guide.

Warranty & Support

This kit includes a 1-year parts warranty. For additional Polaris components, browse our Polaris parts catalog. For warranty details, visit our warranty policy, or contact our team through the contact page.

Fitment

Polaris RZR 900
2017–2024 Models

Take Action

Rebuild your RZR 900 the right way with a complete master engine package, including OEM crank cases. Order today with nationwide shipping.

Veterans and active servicemembers qualify for available discounts. Thank you for your service.