Wiseco Bottom End Rebuild Kit

Choose a vehicle:

User Tip: If you're unsure of your vehicle type, you may skip the machine type selection box.

» Log in to use your Rider Profile Machines
Wiseco Bottom End Rebuild Kit
  • View Larger

    Wiseco Bottom End Rebuild Kit

    Our Price: $152.99$549.99

    MSRP: $224.95 - $614.95 - You save up to $71.96 (32% off)

    View Product Details

    Select type, year, make and model above

    Live Help
    • "Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."

      -Dan Thomas, CEO and Founder

    • Returns

      We take pride in offering no hassle returns. In the event of a return, please call, email or chat with us to receive a solution to the problem. For apparel that doesn't fit quite right, Click here to see our Fit Guaranteed Program.

    • Warranties

      We will stand behind all products we sell with regards to manufacturing defects in workmanship and material. Most products are limited to the manufacturer's warranty. However, we will do everything in our power to take care of the problem.

    • Have questions?

      Live Help (Leave email if after hours)
      Email: sales@rockymountainatv.com
      Call us: 1 800 336-5437
      7am-7pm Mon-Fri 8am-4pm Sat (Mountain Standard Time)

    Details

    • Bottom End Rebuild Kit includes crankshaft assembly, complete bottom end gasket kit, and bearings.
    • Everything you need in one box.
    • Complete gasket set with all engine seals and O-rings.
    • OEM grade main bearing for ultimate smooth operation.
    • Double forged for ultimate strength and durability.
    • Shot peened to remove residual stress and smooth surface blends.
    • Coated bronze thrust washers with dimpling to improve oil retention and reduce friction.

    Wiseco Bottom End Rebuild Kit Reviews

    Each review submitted enters you into a
    $100 gift card monthly drawing and a
    $500 gift card quarterly drawing!
     
    4.4 / 5.0
    19 Reviews
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    14
    2
    1
    1
    1
    Value
    4.7 / 5
    Durability
    4.4 / 5
    Fitment
    4.6 / 5
    Performance
    4.5 / 5
    Recommend it?
    Yes (19)
    Recommend it?
    Yes
    Quality control issue??
    Overall it seemed like a quality crank and it comes with Koyo mains which is a plus. I however had a issue when it came to verifying the timing. The key way groove was off so far that I had to slit my stator plate to achieve factory timing specs. I contacted Wiseco and received no response. I won’t buy another.

    -m-2006 YAMAHA YZ250--
    February 20, 2018
    Auburn, NY, US
    Age: 45-64
    Purchased
    3 weeks ago
    Gender:
    Male
    Weight:
    191 - 220 lbs.
    Height:
    6'1 - 6'3
    Value
    5 / 5
    Durability
    5 / 5
    Fitment
    5 / 5
    Performance
    5 / 5
    Recommend it?
    Yes
    Wiseco bottom end kit.
    Awesome deal with fast delivery and looks better quality than factory.
    September 28, 2017
    Fairfield , OH, US
    Age: 25-44
    Purchased
    4 months ago
    Gender:
    Male
    Weight:
    161 - 190 lbs.
    Height:
    5'10 - 6'0
    Value
    5 / 5
    Durability
    5 / 5
    Fitment
    5 / 5
    Performance
    5 / 5
    Recommend it?
    Yes
    Wiseco complete bottom-end rebuild kit.
    Everything you need to rebuild your bottom-end at an affordable price.
    September 14, 2017
    West Richland, WA, US
    Age: 25-44
    Purchased
    5 months ago
    Gender:
    Male
    Weight:
    161 - 190 lbs.
    Height:
    5'7 - 5'9
    Value
    5 / 5
    Durability
    4 / 5
    Fitment
    5 / 5
    Performance
    5 / 5
    Recommend it?
    Yes
    Excellent
    Would recommend this to who ever is trying to decide which way to go excellent fit and value very satisfied

    -m-2003 SUZUKI RM100--
    September 12, 2017
    Perryopolis , PA, US
    Age: 45-64
    Purchased
    5 months ago
    Gender:
    Male
    Weight:
    221 - 250 lbs.
    Height:
    6'1 - 6'3
    Value
    4 / 5
    Durability
    5 / 5
    Fitment
    5 / 5
    Performance
    5 / 5
    Recommend it?
    Yes
    Good product.
    The only complaint is that it doesn't come with a base gasket. Comes with every thing else you need seems well built.

    -m-2003 KAWASAKI KX85--
    August 8, 2017
    Fort Bridger, WY, US
    Age: 25-44
    Purchased
    7 months ago
    Gender:
    Male
    Weight:
    221 - 250 lbs.
    Height:
    5'10 - 6'0
    Value
    5 / 5
    Durability
    5 / 5
    Fitment
    5 / 5
    Performance
    5 / 5
    Recommend it?
    Yes
    Great kit!
    Not sure why there's some bad reviews on this crank, but my guess would be improper installation. Need to make sure you have the proper tools, service manual, and some attention to detail. I use assembly lube to lube my bearings during install also. The kids give the bikes 9 kinds of heck and the bikes run like a champ!

    -m-DIRT BIKE--
    July 22, 2017
    Fayetteville , NC, US
    Age: 25-44
    Purchased
    9 months ago
    Value
    5 / 5
    Durability
    5 / 5
    Fitment
    5 / 5
    Performance
    5 / 5
    Recommend it?
    Yes
    Money well spent
    Great kit! Everything you need in one box! All gaskets and seal were there and everything was top quality.
    June 15, 2017
    Lethbridge , AB, CA
    Age: 25-44
    Purchased
    8 months ago
    Gender:
    Male
    Value
    3 / 5
    Durability
    1 / 5
    Fitment
    1 / 5
    Performance
    1 / 5
    Recommend it?
    Yes
    Cheap bottom end kit
    I am use to the automotive world where wiseco is normally decent stuff. I purchased this crank to replace a broken wiseco crank to begin with. I have never seen a crank come apart at the shell like the one I was replacing did. Next time I will stick with oem.
    June 12, 2017
    china grove, NC, US
    Age: 25-44
    Purchased
    10 months ago
    Gender:
    Male
    Weight:
    191 - 220 lbs.
    Height:
    5'10 - 6'0
    Value
    5 / 5
    Durability
    5 / 5
    Fitment
    4 / 5
    Performance
    5 / 5
    Recommend it?
    Yes
    Good Kit, includes everything, only one caveat
    Used on a YZ125, really happy with this kit. Only thing that did not fit for some reason was the wrist pin bearing that connects the piston, it was too wide for some reason. But Still give a 5 star because everything else seems to be high quality and a good replacement for OEM. I was worried about gasket quality, but gaskets are very good quality too. Would buy again. Seems like the Wristpin bearing issue was an isolated incident.

    -m-2004 YAMAHA YZ125--
    June 8, 2017
    16438, PA, US
    Age: 15-24
    Purchased
    10 months ago
    Gender:
    Male
    Weight:
    131 - 160 lbs.
    Height:
    5'10 - 6'0
    Value
    5 / 5
    Durability
    5 / 5
    Fitment
    5 / 5
    Performance
    5 / 5
    Recommend it?
    Yes
    Good prices and fast shipping
    Great products and fast shipping

    -m-2004 KAWASAKI KX250--
    May 16, 2017
    Clairmont , AB, CA
    Age: 45-64
    Purchased
    9 months ago
    Gender:
    Male
    Weight:
    <100 lbs.
    Height:
    >6'7
    Each question or answer submitted enters you into a:
    $100 gift card monthly drawing and a
    $500 gift card quarterly drawing!
    Start typing your question and we'll check if it was already asked and answered. Learn More
    Browse 13 questions Browse 13 questions and 55 answers
    Does this kit come with the gaskets and seals necessary for the top end too, or is it just for the bottom end?
    Martin O on Dec 25, 2016
    BEST ANSWER: The kit i received for my '02 YZ250 came with gaskets and seals for the bottom end only. Heads up, I received more seals and o-rings than I could use... I suspect this is a kit that they sell for multiple years that may need different seals and o-rings. Also, note that the kit only includes the main bearings; none of the transmission bearings.
    does the crank kit come with a tube of sealer for the center of the case??
    bernie b on Feb 4, 2017
    BEST ANSWER: I recently purchased the Wiseco bottom end rebuild kit for a '02 YZ250. Mine DID NOT come with a tube of sealer for the the center of the case. I ended up using Permatex Ultra Grey gasket maker and it worked great.
    Are these cranks made in China?
    David B on Mar 26, 2017
    BEST ANSWER: For the yz85 one I purchased? All signs point to made in China. Nothing real visible on the crank itself but the box said China. I have about 1 hour on it so far so good. Installed great, everything fit.
    Are these cranks pre balanced and trued?
    Charles G on Dec 15, 2017
    BEST ANSWER: I believe they are, the only way to know for sure would be to contact wiseco. I've used several of wiseco bottom end kits and have been very happy with them. No issues. I have one now in my CRF450r and I race it in Hare scrambles in Fla.
    Mitch rides Red
    Does it come with a woodruff key?
    JOSHUA C on Mar 30, 2017
    BEST ANSWER: I just installed one on an old YZ250 and it did not come with the woodruff key. Other than that, the kit was perfect and had everything else you need.
    Does this come with the clutch cover gasket?
    TODD C on Aug 13, 2017
    BEST ANSWER: Todd, yes it does come with the gasket. However, the gasket I received in my kit was universal fitting kx 250 from 94-04 and it didn't seal well.
    Are these cranks pre balanced and trued? Anyone have any vibration issues with them? Thanks
    Charles G on Dec 15, 2017
    BEST ANSWER: Yes they are. As for any vibration I have never noticed any. I have used many Wiseco cranks and but 200+ hours on them with no problems.
    Will this fit a 1990 ktm 125 exc?
    A shopper on May 24, 2017
    BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2017 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
    How do I get a bottom end rebuilt kit for a 97 kawasaki KX 125 k4?
    ken l on May 20, 2017
    BEST ANSWER: I looked into our inventory and we unfortunately do not have a bottom end rebuild kit for this machine. I'm sorry for the inconvenience.
    will these crank kits work on a 1995 yz 250?
    Lyle B on May 2, 2017
    BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2017 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
    would like to know if this crank kit will fit a 1995 yz 250 and not is thier one avaiable ?
    Lyle B on Apr 23, 2017
    BEST ANSWER: I looked into this for you and unfortunately this rebuild kit will not fit the 1995 yz250. I checked the rest of our inventory and it looks like the only thing we have available for you machine is the Pro X Connection Rod Kit. I'm sorry for the inconvenience.
    this kit fit a yz125 2003 2 stroke?
    Amelia A on Feb 6, 2017
    BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application. If you have a 2017 year model but don't see your machine as an option, please contact a tech via Live Chat or call us at 1-800-336-5437 for assistance.
    Will this kit fit a 2002 RM250?
    Gerald L on Dec 4, 2016
    BEST ANSWER: To see if this part will fit your machine please enter the make, model, and year into our "Choose a vehicle" drop down boxes found above the product image. If your machine is not listed, we may not carry the right item for your application.
    RM Cash ProgramParts Finder