Description

Master Engine Rebuild Parts for Polaris RZR, Ranger, and ACE 900

This Polaris RZR/Ranger/ACE 900 Master Engine Rebuild Kit fits select 2017-2024 Polaris 900 models. It gives you the major parts needed for a deep engine rebuild, including cylinder, crankshaft, rod, piston, valve, bearing, chain, seal, and gasket components.

This kit is built for shops, mechanics, and hands-on Polaris owners who want the top end and lower end covered in one parts package. It also includes moly upgraded pistons, forged connecting rods, and an HD twin crankshaft for a stronger rebuild foundation.

What This Kit Includes

• New Cylinder
• Oil seal set
• Timing chain
• Oil pump chain
• HD twin crankshaft
• Balance shaft bearings
• Forged connecting rods
• Complete gasket kit
• Complete bearing kit
• (2) Moly Upgraded pistons
• (4) Intake valves
• (4) Exhaust valves

Block Number & Bearing Spec Note

Send us your block numbers before assembly. REV6 can mark your bearing specifications, which helps make the installation process easier once the parts are on the bench.

Technical Support & Build Guidance

For piston setup, ring placement, and final install checks, review the piston and ring installation guide before the engine goes back together.

Because bearing fit matters on Polaris engine builds, the Polaris crankshaft bearing mapping guide is a helpful reference during lower-end assembly. You can also browse more Polaris engine parts and rebuild kits if your repair needs extra parts outside this kit.

Warranty & Support

This master engine rebuild kit includes REV6’s 1-year parts warranty and nationwide shipping. You can review the coverage details on our warranty policy.

Need help checking fitment or bearing information? Contact REV6 and our team can help you confirm the right parts before you buy.

Fitment

This master engine rebuild kit fits select 2017-2024 Polaris RZR, Ranger, and ACE 900 models.

Take Action

If your Polaris 900 needs a cylinder, HD crankshaft, forged rods, moly pistons, valves, bearings, chains, seals, and gaskets, this master kit gives you the parts to tackle the rebuild. Add it to your cart today and send REV6 your block numbers for bearing spec marking.