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YAMAHA GRIZZLY 660 ENGINE

The Yamaha Grizzly 660 became a go-to ATV for riders who wanted dependable power and versatility across work and recreation. Years of riding, storage cycles, towing, and changing terrain can gradually add engine wear even if the ATV still runs. If your Grizzly 660 is becoming harder to start, using more oil, producing smoke, losing compression, or not responding the way it used to, rebuilding early may help avoid larger repairs later.

REV6 offers rebuild options built around how your ATV is actually used and the timing that fits your project. Many customers choose to send in their original engine core because it often helps keep the rebuild process moving, while refundable core options may be available when inventory allows. Every engine moves through evaluation, rebuild work, careful assembly, and final quality checks before shipment so customers know what is going back into their ATV.

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. Tracking information is provided after shipment so you can stay informed through delivery.

  • Yamaha Grizzly 700 engine rebuilt by REV6 master techs – new cylinders, trued crank with new rods, complete gasket set, main bearing/seal kit, oil chain, cam chain roller, valve guide
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    Yamaha Grizzly 660 Engine

     $2,875.00
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    • Helpful Answers Before Sending In Your Yamaha Grizzly 660 Engine

    What are common signs my Yamaha Grizzly 660 engine may need rebuilding?

    Harder starting, lower compression, increasing oil consumption, smoke, unusual engine sounds, reduced throttle response, or changing performance can all be indicators that the engine deserves inspection.

    Do most customers send in their original engine?

    Most rebuild projects begin with the customer’s original engine core because it often helps scheduling and turnaround stay more predictable. Depending on inventory and timing, refundable core options may also be available.

    What should I pay attention to during the first hours after installation?

    Early operation matters. Monitor oil level regularly, vary engine speed and load, avoid extended periods at one RPM, and pay attention to fluid condition during break-in.

    How does REV6 help customers stay informed throughout the process?

    Our customer service and sales teams remain available to answer questions and help coordinate next steps. Once shipped, tracking information is provided so you can follow delivery progress and prepare for installation timing.
    Shop Yamaha Grizzley Models
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    WE KNOW YOUR YAMAHA GRIZZLY 660 ENGINE

    Every engine we build is done by one of our master technicians. With over 35 years of experience, your engine is in great hands.
    Yamaha Grizzly 660 Engine Include:
    • A full inspection of engine core
    • Clean, blasted/inspected engine cases
    • HD single crankshaft
    • Remanufactured cylinder head
    • Valves
    • Valve seats
    • Valve stem seals
    • Valve springs
    • Valve guides
    • Standard bore cylinder
    • Moly piston kit
    • Main bearings
    • Camshaft
    • Timing chain
    • Oil pump chain
    • Oil pump gears
    • Timing guides
    • Camchain tensioner
    • Oil pump
    • Regulator valve
    • Seals
    • Complete gasket kit
    • Assembly by a master technician
    • Quality control inspection
    All Yamaha Grizzly 660 Engines Include the Following Upgrades:

    • Upgraded moly piston
    • Upgraded manganese bronze valve guides
    • Upgraded connecting rod
    • Better piston to cylinder wall specifications
    • Better bearing specifications

    We have Yamaha Grizzly 660 engine options to fit your needs:

    Warranty                Financing             

    1-2 year warranty badge
    We are so confident in our craftsmanship that each Yamaha Grizzly 660 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 ENGINE.

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

    WE BUILD BETTER YAMAHA GRIZZLY 660 ENGINES!

    CALL ALREADY!
    Call or Text Now 801-489-8697
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    • Monday-Friday
    • 8:00 am – 5:00 pm MDT
    • (801) 489-8697
    • Monday-Friday
    • 8:00 am – 5:00 pm MDT
    • Saturday 8:30 am - 2:30 pm (Sales Calls Only)
    • 180 West 900 North
      Springville, UT 84663

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