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dBDawg
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VBMWMO #8575
Joined: 01/18/2013
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Can anyone in the states point me to someone who can recondition this part? I can't find anyone in my area that will touch it because it's a small job. Otherwise, if I have to get one made, tell me what material I should have this made out of and to what hardness. Thanks

  • bmw_r11_-_trans_-_02.jpg
jrapose
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VBMWMO #8617
Joined: 02/12/2007
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What is wong with that one

I don't know much about transmissions...what is the problem ? I once had a yoke spin on the shaft..i had to replace the yoke and we cleaned the shaft... it worked just fine. I have several old transmissions that might have a useable shaft if you need one.. I think having one made up would be really expensive...

Joel

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VintageSalesand...
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VBMWMO #7368
Corona, CA
Joined: 03/24/2008
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output shaft

Hi,

What model is it for?

Jeff

Darryl.Richman
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VBMWMO #6285
Surf City, USA (Santa Cruz, CA)
Joined: 10/27/2006
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It looks to me like it's for

It looks to me like it's for a 3 speed model, so R11/R16 or earlier.

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dBDawg
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VBMWMO #8575
Joined: 01/18/2013
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R11/R16 3 speed

Yeah, Darryl is correct. It's to a three speed transmission. It's hard to tell what's going on with it but in the area of the rear bearing by the taper, it looks to be welded or plated at some time. The diameter varies between 24.77mm and 25+. I'm not sure what to do with it honestly. I've talked to 10 different guys who all have a different opinions. The latest idea I received was to flame spray it and grind down to size in order not ruin the shaft hardness. But the same guy who suggested that said it might already be compromised if indeed it was welded at some point.

Making it would indeed be expensive and I would like to avoid it if possible. The rest of the shaft is in good enough condition. It's the bearing that won't sit right.

Ian R11
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VBMWMO #8148
Yorkshire uk
Joined: 10/22/2011
Posts: 199
Shaft repair

It looks to me as if the bearing has been spinning and worn through the surface hardening on the shaft.
I had a repair done by cylindrical grinding the shaft down to allow a hardened sleeve to be fitted and then finished by grinding back to correct size. I didn't see the job get done but the sleeve is only around 1.5 to 2mm thick and told it was bonded to the shaft with a loctite type product.

Darryl.Richman
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VBMWMO #6285
Surf City, USA (Santa Cruz, CA)
Joined: 10/27/2006
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A common way of repair crank

A common way of repair crank bearing journals and pins is to grind down the area to a uniform shape, plate it with industrial hard chrome, and then grind to size. As this area supports a bearing and a bushing with a gear on it, I would think that would be a viable solution - but I have never done such a thing, so this advice is worth exactly what you paid for it.

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pokie
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Joined: 02/08/2015
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Worn Shaft

Dbdog, you don't state where you are (States or Europe,.....). If you are here in the states, you could try contacting Dan at Cycle Works. He has a place/ fellow he uses for precision chrome grinding. Maybe he can save the original shaft for you. I would think it would at least be worth a try.

dBDawg
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VBMWMO #8575
Joined: 01/18/2013
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So hard chroming, flame

So hard chroming, flame spray, sleeving is all coming in at quotes of $900 to $1000. This includes repair of the end thread as well which is all bashed up and bent. I got a quote to make a new one at $1500 or 4 for a $2000. Anyone need one of these things? ha ha, think I might go buy a lottery ticket tonight or bury the damn thing in the back yard.

pokie
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VBMWMO #70
Joined: 02/08/2015
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Burying it?

I guess you could bury it in the back yard, that's where the transmission of one of my bikes was unearthed. The previous owner of said transmission got irritated because he couldn't get it apart and broke the flange on the rear cover trying. My guess is he tossed the silly thing out into the back garden. It was unearthed by the new home owner. I can't say how long it was buried out there but the cover was part way off and it was full of mud. I pulled it apart, gave it an overhaul and repaired the cover, it's now in a bike I use regularly. Maybe some day someone will find your shaft in your back garden and be just the thing he was looking for.

Give Dan a call, I bet he can do it for less than other places have quoted you.

dBDawg
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VBMWMO #8575
Joined: 01/18/2013
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Well, that's kind of amazing

Well, that's kind of amazing Pokie. What kind of bike was it to? Do you have the contact for Dan at cycle works? Not sure to whom you're referring

pokie
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VBMWMO #70
Joined: 02/08/2015
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Cycle Works

dBDawg, the business is Cycle Works. The fellow you'll be contacting is Dan Neiner. Their website is http://www.cycleworks.net/ The company was started by Ed Korn, machinist and BMW enthusiast. Tell him Pokie sent you, good luck!

The "back garden" transmission is being used in my R60/2 custom build (not a chopper). If you're interested, you can read about the build on my web page. I don't update my web page very often but here's the build thread http://pokiespages.com/bmwflat.htm

dBDawg
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VBMWMO #8575
Joined: 01/18/2013
Posts: 53
You're my kind of guy

ha ha, Yeah!! You're my kind of guy. That bike is out of control. I did the same thing, kinda, except made it electric. Everything is from scratch except the front/rear wheel and battery. It's more cafe racer style. Made the frame two times over to get it right and made the front end from scratch including triple trees. I turned the headlight as well to fit electronics and an LED I found. Only thing left to do is paint it. But that comes after I finish the current project.

  • cm_150101.jpg
pokie
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VBMWMO #70
Joined: 02/08/2015
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Cool!

dBDawg, I like it! I hope it brings you lots of smiles.

dBDawg
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VBMWMO #8575
Joined: 01/18/2013
Posts: 53
Just Thought I'd give an

Just Thought I'd give an update to this part progress. I decided to have the shaft coated with hard industrialised chrome. It required the shaft to be ground undersize for prep, chromed oversize, and then reground to diameter. I only did what was needed, that being the straight shaft section and not the taper, hence the dividing line. The thread still has to be repaired on the end but will be an easy fix. Cost was a quarter of a new one. I'm happy with the result so far....

  • bmw_r11_transmission_output_shaft19.jpg
pokie
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VBMWMO #70
Joined: 02/08/2015
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Hard chrome

Nice to hear things are moving forward, keep it up!

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