1977 1978 Suzuki RM125 Crankshaft Assembly and Build
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- เผยแพร่เมื่อ 20 พ.ย. 2024
- In this video I finish up the repair and build of the 1977/1978 Suzuki RM125 Crankshaft. We go through some spec's and press the crank together and check the runout, rod defection, and the big end bearing gap.
• 77/78 Suzuki RM125 Cra...
You said you were amazed. Why was I not? Your care and quality of workmanship is second to none. And your closing words show what a good person you are.
Cheers,
Peter.
Thanks Peter, I sure appreciate your support. Means a lot.
Your good friend who saved another bike. That's a top notch quality repair.
Thanks Gary means a lot coming from you.
Great job, Dale. Got me reminiscing, I had a 77 rm250 back in the day.
Man, I know, I get to thinking of all the machines I have had, wish I had never got rid of my 79 RM400. But these days all I could do is look at it. Pretty sure I couldn't kick it over these days. LOL
Thanks Dale, really like your vids!
Thanks Jeff, I am having fun making them. Appreciate you spending time in the shop with me.
Awesome Job Dale, Thanks For Posting !!!👍
Thank you very much.
Dale I have no doubt that the crank will run as it did from the factory with no more problems. Everything you have done is from sound engineering principles and the quality of your work is always supreme. I think this video series is the go-to for this particular repair.
Best wishes, Dean.
Thanks Dean, I will have to admit, I would just as soon not do another repair like this one. Man, that was a lot of work. I was happy with the outcome for sure, but there are parts that I would do different if doing it over again. Ready to go on to something simpler.
Great video
As a machinist/machinery repairman at a good processing plant,one of my jobs was rebuilding precision gear boxes and pumps,mostly in various stainless varieties,and have used methods like this,when no other option available
Great job,your work is spot on
Thanks Wally sounds like you have lots of experience. I just like to tinker and learn stuff.... keep the old mind working you know. I am not a pro at anything but sure enjoy the older dirt bikes and motorcycles.
@@montana2strokeracer same here,old mowers ,cars ,motorcycles, anything that explodes and goes round,I gotta look at it
What a throughly cool video. Well done! You may have been surprised at how it initially came out, but I wasn't. So many tips and tricks in a short video. Outstanding, my friend!!!
Thanks Jim, I too learned some things with this one. Ask me next time we talk. Take care bud.
To press align with your eye & a square & it not needing truing is remarkable. You must have been well happy with that.
You bet; most are a challenge for sure, Nice to get a break. Must be living right. LOL
What an amazing job Dale. You know the ole saying, Even a blind squirrel gets the nuts first.
Don’t you just love it when you get everything lined up first shot?
I just could not believe it myself; this never happens.
Wow that is amazing. Perfect. Good job brother.
Thanks Cain, appreciate you spending time in the shop with me.
That is cool! I did that for many years and was trained by a Rotax tech at the Harley Davison Motor Company in 1981 exactly like that. It was one of my favorite things to do and the skill learned helped me in many ways taking on other industrial jobs in the machine shop, thanks!
Hey thanks for stopping by Don, I am a regular on your channel. I am picking up tips every time I watch. Sure, appreciate you sharing your knowledge with us want to be machinists.
@@montana2strokeracer this video just popped up! You are already a machinist. there is a lot going on when building these crankshafts and the nature of metal is learned in another way.
great job dale if only thay all trued up first time but i enjoj doing it its a challene keep up the good work
Thanks Mark, yes most are a challenge, nice to get a break, you know what I mean.?
Thanks Dale!
Thanks Chris, you sure have an awesome project going, waiting to see the next one takes off too.
Hi Dale, another great video as usual. I hate to be the bear of bad news but I should point out that when measuring run out on V-blocks the dial indicator cannot be running above the V-block, it needs to be reading far outboard from the vee block as possible. The way you measured is only telling you how round the shaft is! I guarantee if you move those indicators outward you will get a different reading. I was not surprised that both cranks measured in your video were only a thou or two of runout. All cranks are best measured using knife edge vee blocks, the more contact area on the journals the more difficult it is for the indicator to detect any run out.
I hope this helps you out some, and I don’t mean to be the one to point out anyones wrong doings, just think it’s important to note. Take care and see you on the next video.
Dan
Hey Dan, no offence taken, I knew this was too good to be true, and kept thinking and experimenting. I did place the indicators out to the ends of the crankshaft and started to see the light. I grabbed a handful of square tubing and made an adjustable knife blade type fixture (as showed in my Kawasaki manual). Then rechecked the crank and was surprised again to only find it out .003 on one side and .004 on the other, so it was darn close anyway. Couple good wacks with the brass hammer and bobs your uncle. I just don't do it this way and was a little confused about the whole thing. Much prefer between centers. But this was a good thing to run into because more and more of the cranks have the centering holes messed up these days. So, I needed to make a fixture so I can do those. I also found using the vee blocks I have if you run the indicators up on the crank halves you can get the readings, you're after, but it is awkward for me, and those cranks halves are always a little ruff for something like that. The fixture I built is working just fine. You will see it in future videos, I am sure.
I do appreciate your comment and wish you had been here in the shop at the time to straighten me out on this. I'm a slow learner sometimes, but glad something was telling me to investigate further. Thanks for spending time in the shop with me.
@@montana2strokeracer Hey Dale, I also made this same mistake when I first started building and modifying my engines. It wasn’t until someone more experienced in the matter pointed it out.
I have learned many a thing from your videos, more than I could count with the fingers on my two hands, and I’m sure many more to come.
I’d be very interested to see the fixture that they show in the Kawasaki manual, maybe you could include that in an upcoming video?
Take care
Dan
Outstanding work! I enjoy watching the technical stuff. Your pretty amazing. I've learned a couple thing's you that i used myself. Have you ever heard of crank bearing inserts working loose on 77-79 Yamaha IT175 cases. Many other IT models were plagued with the issue as well. Do you just work on your own builds or open to look at others bike issues. Just curious sir.
Hi Albert, thanks for watching the channel, I have not heard of the bearing insert issue, I have a 79 IT175 that I will be bringing into the shop soon. I have never worked on one of them, so I will be learning as I go. I am slowing down on working on others bikes, I do take some outside work in on occasion. Other than that, I am mostly finding bikes to restore or part out, or just for cool projects for the shop and the channel.
Here
Absolutely!
ah ha, im first for a change. lets get to work guys.
How did that happen?
@@montana2strokeracer easy just sit at the computer and click the message bell, that easy! LOL
I have a 1977 RM 125 crank half ignition side (rotor) that I need this repair done on . Do you offer repairs like this ? I just read the comments that this was a lot of work for you ? Thank you great repair and great video .
Hi, yes, it is a lot of work, but one side not as bad as both. Just had another gentleman ask about this same repair. Not many of those cranks out there. Cranks that have not been abused are hard to find. I do take on outside work, but not now till fall. If you're not in a hurry and can wait, email me and we can discuss your project.
dsweger@bresnan.net