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Crankshaft AssembliesCrankshaft Assemblies

ATV Crankshaft Assemblies

If you have a seized engine, or are looking to overhaul or rebuild your engine, don’t forget to replace your crankshaft. Crankshafts rarely break, but considering that they are such a major component of your bottom end, they can cause a lot of damage if they do. At Rocky Mountain ATV/MC, we carry durable, quality crankshafts to get your engine running strong again in no time.

We carry full crankshaft assembly kits and connecting rod kits that are built to OEM specifications and designed to meet or exceed OEM performance. Our kits from Hot Rods and Pro-X are designed to last the lifetime of your ATV when properly cared for.

If you would like a stock crankshaft instead, be sure to check out the OEM section of our website to get the original manufactured crankshaft and any additional accessories that you may need. Check out our selection of crankshaft and connecting rod kits for your ATV today!

Latest ATV Crankshaft Assemblies Reviews – You could win up to $500 for reviewing products!

  • Hot Rods Complete Crankshaft Assembly

    Hot Rods Complete Crankshaft Assembly

    Jed in UT

    utmost quality from Hot Rods

    When you think of a crankshaft the first name that comes to mind is probably Hot Rods, and for good reason. Hot Rods products have set the bar exceptionally high and are hard to beat. If you love your ride as much as i do, you want quality. Do yourself a favor and don"t cheap out on a main component like a crank or a cam. buy a Hot Rods and do it right the first time.

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  • Hot Rods Complete Crankshaft Assembly  - Heavy Duty

    Hot Rods Complete Crankshaft Assembly - Heavy Duty

    Steven in TX

    Excellent Part

    This crank now has 75hrs on it. Runs like the day it was installed. Just installed a 3rd piston since the crank install. Could not be happier with this product. Installed the hot rods main bearings & seals as well when the crank went in. Im also running 13.5 comp ratio pistons. Will easily go another 75+ hrs. Every bit a durable as stock & maybe more so.

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  • Hot Rods Bottom End Kit

    Hot Rods Bottom End Kit

    ANGEL in CA

    Great price for this complete kit

    Comes with all the parts need for rebuilding the bottom end. Quality finish and fit, without the OEM price.

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  • Hot Rods Connecting Rod Kit - Heavy Duty

    Hot Rods Connecting Rod Kit - Heavy Duty

    CHRISTOPHER in IN

    They are not kidding about the heavy duty

    This rod appears much beefier than stock. It also has a brass(?) sleeve on the small end.

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  • Pro X Connecting Rod Kit

    Pro X Connecting Rod Kit

    NATHAN in MO

    TRX250R PRO-X ROD

    IF YOU HAVE A TRX250R AND NEED A NEW CONNECTING ROD AND LOWER ROD BEARING, THIS IS THE KIT THAT YOU WANT TO BUY. BEARING AND ROD ARE MADE OF HIGHER QUALITY STEEL THAN THE HOTROD'S KIT OR ANY OF THE EBAY BRANDS. THIS ROD AND BEARING IS MADE IN JAPAN, AND SUPPOSEDLY IN THE SAME FACTORY THAT PRODUCED THE OEM HONDA RODS BACK IN THE 80'S.

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  • Hot Rods Connecting Rod Kit

    Hot Rods Connecting Rod Kit

    AARON in WA

    Well Made Kit!

    this is a very good product. my rod lower end was getting loose so i ordered this kit. it even came in a very nice little plastic case, not a bag! all items need to replace the rod came with it, i did not have to order anything else from the dealer.

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