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POLARIS 11-12 RZR 900 ENGINES

Your Polaris RZR 900 side-by-side was built to cover miles and keep the fun going, but oil use, slower throttle response, lower compression, smoke, or harder starts can all be signs the engine is asking for attention.

REV6 gives customers flexibility based on timeline and rebuild goals. Many owners choose to send in their original engine core because it often keeps the rebuild process moving, while refundable core options may be available when inventory allows. Each engine is reviewed, rebuilt, assembled, and verified before shipment.

Every rebuilt engine includes our industry-leading 1-year no-fault warranty, with the option to upgrade to a 2-year no-fault, no-questions-asked warranty. Once your order ships, tracking information is provided so you can stay informed through delivery.

  • Polaris RZR 900 engine rebuild 2011-2012 restored engine with refreshed internals and improved compression. All components are cleaned, dismantled, inspected and repaired as needed. Cylinder head inspected, cleaned, sandblasted, decked, rebuilt, shimmed to manufacturer spec and undergoes a quality inspection. Exhaust valve guide replaced with manganese bronze valve guides for high RPM performance. Intake valve guides inspected and replaced as needed. Valves and valve seats recut/refaced to ensure tight seal, verified with vacuum test. Camshafts lobes and journals cleaned and polished, replaced as needed. Crankshaft is inspected and verified within OEM specs.  Crankshaft main bearings and rod bearing are replaced with new high-babbit coated bearings. Cylinders are inspected for wear and damage. Worn cylinders are replaced with refurbished and hone finished nikasil coated cylinders. Pistons replaced with moly coated pistons and rings. Timing chain and oil chain inspected for stretch and wear, replaced as needed. Refurbished oil pump assembly. Fully inspected and machined engine cases, tested for journal wear, cracks, holes, or excessive wear. All gaskets and seals replaced. Engine assembled and torqued to manufacturer specifications by REV6 Powersports
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  • What are common signs my RZR 900 engine may need rebuilding?

    Lower compression, increased oil consumption, smoke at startup, reduced acceleration, unusual engine noise, or performance that feels inconsistent can all be indicators that it is time to evaluate the engine.

    Do customers usually rebuild their original engine?

    For most rebuilds, customers send in their original engine core so work can begin around the engine they already own. Depending on inventory and build timing, refundable core options may also be available.

    What should I expect during the first hours after installing a rebuilt engine?

    Early operation matters. Avoid extended steady RPM, vary engine speed during use, monitor oil level regularly, and follow recommended break-in procedures based on engine type and operating conditions.

    What warranty protection comes with a rebuilt RZR 900 engine?

    Every rebuilt engine includes REV6’s 1-year no-fault warranty. Customers who want additional long-term coverage can also choose to upgrade to the available 2-year no-fault, no-questions-asked warranty.

    How do I stay updated after my engine ships?

    Tracking information is provided with shipped orders so you can follow delivery progress and plan for installation and arrival timing.

    WE KNOW YOUR RZR 900 ENGINE

    Every RZR 900 engine we build is done by one of our master technicians. With over 35 years of experience, your RZR 900 engine is in great hands.
    All RZR 900 Engines Include:
    • A full inspection of engine core
    • Clean, blasted/inspected engine cases
    • Remanufactured cylinder head
    • Crankshaft
    • Intake camshaft
    • Exhaust camshaft
    • Connecting rods
    • Nickel Plated Cylinders
    • Counterbalance shaft
    • Counterbalance bearings
    • Main bearings
    • Crankshaft bearings
    • Crankshaft bearings
    • Valve Guides
    • Intake & exhaust valves
    • Valve stem Seals
    • Valve Seats
    • Valve springs
    • Timing chain
    • Oil pump chain
    • Oil pump
    • Timing guides
    • Timing tensioner
    • Seals & gaskets
    • Assembly by a master technician
    • Quality control inspection
    All RZR 900 engines include the following upgrades:
    • Upgraded moly pistons
    • Upgraded manganese bronze valve guides
    • Better main bearing specifications
    • Better Connecting rod bearing specifications
    • Better Piston to cylinder wall tolerances
    • Upgraded timing guides
    • Modified cam caps (better oiling capabilities)
    • High temperature valve stem seals

    We have RZR 900 engine options to fit your needs:

    RZR 900 PARTS                WARRANTY                FINANCING

    1-2 year warranty badge
    We are so confident in our craftsmanship that each Polaris 11-12 RZR 900 engine comes with a 1-year warranty. We offer free shipping inside the 48 continuous states and Canada.

    Work with the best when it comes to your Polaris 11-12 RZR 900 engine.

    The REV6 Powersports team standing side by side in our REV6 shop in Utah

    We rebuild engines better than new

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