CRANKSHAFT ASSEMBLIES

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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!

  • Wiseco Bottom End Rebuild Kit

    Wiseco Bottom End Rebuild Kit

    Justin in UT

    Not a bad setup, especially if you're on a budget.

    I have heard some good and some bad about these crank kits. I personally have not had a bad experience with them, and my current bike has one in right now and I have no issues.

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  • Hot Rods Bottom End Kit

    Hot Rods Bottom End Kit

    Bruce in WA

    Easy to navigate web site and fast delivery.

    Read All Reviews
  • Pro X Connecting Rod Kit

    Pro X Connecting Rod Kit

    Scott in OK

    2004 Suzuki RM125 (worked like a champ)!

    Pro-X parts are great, just got my 2004 Suzuki RM125 crank pressed (people are still around that do this). It is working perfectly, I also used the Pro-X Main Bearings (as well) working great!

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  • Hot Rods Complete Crankshaft Assembly

    Hot Rods Complete Crankshaft Assembly

    Steven in TX

    Great part

    I now have 110 hours on this crank in a crf450. Has performed perfectly. Just put a 3rd piston in & still no play in the lower end. Its as tight as it was when installed. No reason to think it wont go another 100 hrs. Im sure it will. I do change my oil about every 8-10 hours of run time & use motul 300v oil. Very happy with this part. Ive purchased one for my ktm 300. Also used hot rods bearings & seal with the crank.

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  • Hot Rods Complete Crankshaft Assembly  - Heavy Duty

    Hot Rods Complete Crankshaft Assembly - Heavy Duty

    Dana in MA

    $300 now or $800 later. Up to you.

    Don’t wait for it to let go. Tick tock tick tock. $$$$$$$$$$$

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  • Wrench Rabbit Engine Rebuild Kit

    Wrench Rabbit Engine Rebuild Kit

    paul in NM

    Very impressed

    Great product and fast shipping has everything needed to complete the job well done for sure.

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