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2 Stroke Dirtbike Crank Rebuild

In a day of replace instead of repair, I decided to give a shot at the art of rebuilding single cylinder 2 stroke crankshafts. I filmed this video a while ago and never got around to actually posting any of it. I hope you found the process of rebuilding this YZ125 crankshaft entertaining!

Пікірлер: 52

  • @Richiehervig
    @Richiehervig2 жыл бұрын

    I’ve never seen crank truing before. It really is an art. Enjoyed the video man 🤙

  • @milwaukeeaterfu2190
    @milwaukeeaterfu21903 ай бұрын

    awesome, i'm gonna do it myself, since over at crankworks az they completely screwed me on my crankshaft service, pressed the wrong one together and just sent it back. i would never ever do busy with them, ever.

  • @donaldvonlintig8445
    @donaldvonlintig8445 Жыл бұрын

    I haven't seen anybody do that, since I did them, back in the day, when my buddy seized-up his Suzuki RM 125, at full speed.The Rod was fused to the Crank, it took a lot of pressure, in the press to get it apart, but I got it back together, less than .001, and it ran great. Now I'm looking to do my 1988 CR500 crank, that's been sitting around for years. Plus it helps when you worked in a machine shop your whole life.

  • @Sir_Wilo
    @Sir_Wilo2 жыл бұрын

    That was pretty dope never seen videos on crank rebuilds

  • @jameselias9399
    @jameselias93992 жыл бұрын

    Awesome video. You are very talented

  • @keeganfoster1792
    @keeganfoster17922 жыл бұрын

    Learned alot nice work

  • @MrKdobbins
    @MrKdobbins Жыл бұрын

    Nicely done

  • @motoxjim929
    @motoxjim9292 жыл бұрын

    Awesome video!!!

  • @NotAMotoVlog
    @NotAMotoVlog Жыл бұрын

    That was so satisfying

  • @harleyloco1853
    @harleyloco1853 Жыл бұрын

    Very impressive

  • @dreece2000
    @dreece2000Ай бұрын

    Damn boy got skills

  • @therawlifefamily
    @therawlifefamily7 ай бұрын

    KTM makes a tool that holds the crank halves in alignment while you press them. Works really well

  • @Enjoy2Ride250
    @Enjoy2Ride250 Жыл бұрын

    Yo that’s satisfying af😂

  • @IdahoDirtBiker9908
    @IdahoDirtBiker99083 ай бұрын

    Really it’s that easy and I have been sitting buying new cranks I’m about to save a lot of money

  • @himotox2788
    @himotox27882 жыл бұрын

    thats impressed asf

  • @LilLefty27
    @LilLefty272 жыл бұрын

    Seriously, do you have any technical background like mechanic schooling? Your skill set and knowledge in the shop is so impressive 👍

  • @akmoto_

    @akmoto_

    2 жыл бұрын

    No schooling or anything. Just me figuring stuff out through experience and research.

  • @BubbaX

    @BubbaX

    3 ай бұрын

    He has a press

  • @ManuelTorres-wx8rt
    @ManuelTorres-wx8rt11 ай бұрын

    I see that you are very good at your job, have you ever seen the HOT RODS brand, do you know if it is good?

  • @oprghost7227
    @oprghost7227 Жыл бұрын

    Hi I’m rebuilding a yz250, I replaced the bearings along with the bearing cap/seals and the crank as well. When I went to put the casing back together, it didn’t want to fully seet down. I ended up getting it about a quarter inch away from being fully flush but it won’t go the rest of the way down. When i tried putting a few screws in the block and lightly torquing them down to see if it would help, it caused the crank to freeze up and also made no difference in the gap in the block. Any ideas?

  • @bumpstartnether
    @bumpstartnether2 жыл бұрын

    Good setup! Did you make that truing stand? Where did you get that set of dial indicators? I’m looking to do similar for my builds. Do you ever weld or stake the pin after?

  • @therawlifefamily

    @therawlifefamily

    7 ай бұрын

    you can make one easily out of a wheel truing stand. The Tusk one has uprights that you have to bolt down so what I did was drill a set of holes so I could move one upright close enough to hold a crank.

  • @buhbuh6515
    @buhbuh65159 күн бұрын

    How many tons of pressure is your hydraulic press going at on the crank webbing?

  • @morgandewalt8333
    @morgandewalt8333 Жыл бұрын

    Do you offer this as a service? If so, where are you located?

  • @yamaha5980
    @yamaha59802 жыл бұрын

    (If parts were included) would you rebuild my 2011 yz125 crank if I sent it to you? I’m located in Oklahoma. Anyways nice video

  • @alrichbalisbissr.
    @alrichbalisbissr. Жыл бұрын

    Shot out

  • @madmarc
    @madmarc10 ай бұрын

    Is that a steel press plate, or aluminum?

  • @VolkyHaus
    @VolkyHaus20 күн бұрын

    where can i get a kit for indian minarelli p4 70cc rod

  • @timmyers2302
    @timmyers23025 ай бұрын

    What thickness steel plate did you use

  • @simeonmitkov5445
    @simeonmitkov544511 ай бұрын

    how did you balance it

  • @vigorousboredom7016
    @vigorousboredom70163 ай бұрын

    The visuals in this video are excellent. However, I don't understand the need to add a musical soundtrack. If I wanted to listen to music, I would go find music videos that I enjoy. Other than that, the refurbishing job on the crank is spot on.

  • @dougroemer2715
    @dougroemer2715 Жыл бұрын

    Same question below, did you build your own truing stand? Can you please share what you use to build this?

  • @therawlifefamily

    @therawlifefamily

    7 ай бұрын

    Start with a Tusk Wheel Truing stand, drill 2 holes on the base and bolt down one of the uprights in the new holes so that the uprights are close enough together to hold a crank

  • @dannytyson3278
    @dannytyson32782 жыл бұрын

    How much does one cost

  • @skywatcher8639
    @skywatcher86392 жыл бұрын

    Hi, i have a cuestion, it is posible to fit a crankshaft from 90's or earlys 2000 on my 1987 125cc two stroke??? My cuestion is because i cant find any crankshaft for my YZ 😑

  • @therawlifefamily

    @therawlifefamily

    7 ай бұрын

    You'll have to get measurements of each.

  • @Jursaw
    @Jursaw Жыл бұрын

    So to true it, you just hit it with a brass hammer? You should show how you built that truing stand

  • @therawlifefamily

    @therawlifefamily

    7 ай бұрын

    Start with a Tusk Wheel Truing stand, drill 2 holes on the base and bolt down one of the uprights in the new holes so that the uprights are close enough together to hold a crank

  • @azerty-qy2fc
    @azerty-qy2fc Жыл бұрын

    Pourquoi a la fin le comparateur n'est plus placé tout au bout du cône ? Plutôt que en face du roulement.

  • @troolllllinnnzaragoza3169
    @troolllllinnnzaragoza316911 ай бұрын

    I need my 1995 yz125 crank rebuilt. I need the connecting rod replaced and the crank balanced. Please help. I’ll pay for shipping.

  • @bozly209
    @bozly2098 ай бұрын

    So what keeps the cranks trued after hitting with the hammer? They just stay in place?

  • @therawlifefamily

    @therawlifefamily

    7 ай бұрын

    The lower rod pin is REALLY tight. Normally you can't get a side to budge by holding it, you have to keep one side against a hard/stable surface.

  • @motik954
    @motik9546 ай бұрын

    3:50 😊

  • @JRBean
    @JRBean Жыл бұрын

    Where did you get that stand? I want one!

  • @akmoto_

    @akmoto_

    Жыл бұрын

    I made it out of a castor fork

  • @JRBean

    @JRBean

    Жыл бұрын

    @@akmoto_ I'd love to see more of it, can you send me some pictures or do a video on it?

  • @therawlifefamily

    @therawlifefamily

    7 ай бұрын

    @@JRBean What I did was start with a Tusk Wheel Truing stand, drill 2 holes on the base and bolt down one of the uprights in the new holes so that the uprights are close enough together to hold a crank

  • @JRBean

    @JRBean

    7 ай бұрын

    @@therawlifefamily I was just looking at those yesterday, need to build a set of wheels sounds like a good excuse to pick one up. Thanks for the idea!

  • @thrustprop67
    @thrustprop67 Жыл бұрын

    your trueing stand idea,,,, if the pins that go through the bearing bores are not slightly larger than the bore the bearings will not be concentric and cause inaccurate reading ,,,, better to use cheap off shore vee blocks

  • @therawlifefamily

    @therawlifefamily

    7 ай бұрын

    An easy way to check this is to take a known good crank and see what your runout is.

  • @kennythomas57
    @kennythomas574 ай бұрын

    crank is bent

  • @iantakacs6388
    @iantakacs6388 Жыл бұрын

    You do rebuild for them I’ll pay you😅