2 Stroke Dirtbike Crank Rebuild
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- Опубліковано 8 бер 2022
- 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!
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I’ve never seen crank truing before. It really is an art. Enjoyed the video man 🤙
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.
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.
Awesome video. You are very talented
That was pretty dope never seen videos on crank rebuilds
Nicely done
Learned alot nice work
Awesome video!!!
That was so satisfying
Very impressive
KTM makes a tool that holds the crank halves in alignment while you press them. Works really well
Yo that’s satisfying af😂
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.
Really it’s that easy and I have been sitting buying new cranks I’m about to save a lot of money
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?
Seriously, do you have any technical background like mechanic schooling? Your skill set and knowledge in the shop is so impressive 👍
No schooling or anything. Just me figuring stuff out through experience and research.
He has a press
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?
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.
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?
thats impressed asf
Do you offer this as a service? If so, where are you located?
(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
Is that a steel press plate, or aluminum?
Shot out
Same question below, did you build your own truing stand? Can you please share what you use to build this?
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
What thickness steel plate did you use
So to true it, you just hit it with a brass hammer? You should show how you built that truing stand
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
how did you balance it
So what keeps the cranks trued after hitting with the hammer? They just stay in place?
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.
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 😑
You'll have to get measurements of each.
How much does one cost
Pourquoi a la fin le comparateur n'est plus placé tout au bout du cône ? Plutôt que en face du roulement.
3:50 😊
I need my 1995 yz125 crank rebuilt. I need the connecting rod replaced and the crank balanced. Please help. I’ll pay for shipping.
Where did you get that stand? I want one!
I made it out of a castor fork
@@akmoto_ I'd love to see more of it, can you send me some pictures or do a video on it?
@@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
@@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!
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
An easy way to check this is to take a known good crank and see what your runout is.
crank is bent
You do rebuild for them I’ll pay you😅