BMW K bikes (Bricks)

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MartinW

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I will probably have to replace my drive shaft splines in the near future. In the US you have Bruno in the UK you can get replacement splines from Motobins. So has anybody had their splines replaced in OZ, preferably around Brisbane but anywhere in OZ. If you have had it done are you happy with it? I have been thinking of getting the replacement splines from Motobins, but I am unsure of who to get to weld in the replacement. And another question how do they weld in the new splines without damaging the rubber damper in the shaft. Due to the fact I will suffer withdrawal, does anybody local have a spare shaft with shot rear splines but good front splines that they are willing to sell.
Regards Martin.


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Laitch

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@MartinW wrote:I will probably have to replace my drive shaft splines in the near future. In the US you have Bruno . . .
Bruno continues to be off the radar, as far as I can determine. Bomar's and Hansen's are in the USA and still offering that service—others too, probably.


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MartinW

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Laitch that's a pity, due to his excellent reputation I did consider trying to somehow buy a secondhand one in the US or Canada have it reconditioned by Bruno and shipped back to OZ. I dropped the idea due the complications and freight costs. There are a couple of car drive shaft specialists locally and if I can't find a solution they might be worth approaching. At this stage the need is not dire but if I do it now it would save the last minute panic. 
Regards Martin.


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Packo

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Fairly certain Munich's offer an exchange service and also sell a new shaft, but only 20 spline not the early 16's.
Alternatively, there is a guy in Adelaide that will do the job, let me know if you want his details
Waz, posted up in his thread "transformed again" how to do it as well,
Sorry, I don,t know how to put up the link


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MartinW

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Thanks Packo I'm hoping to find someone local, but I'll let you know. Hopefully Waz will point out his post. In the meantime I'll try searching.
Regards Martin.


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Tom FKR

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G'day Martin, splines can be purchased from Munich and I think Motobins. They can be welded on by a competent welder. There is a driveshaft, final drive and swingarm for sale on Gumtree but it is probably a 16 spline shaft. Here is the link. Cheers Tom

https://www.gumtree.com.au/s-ad/nicholls/motorcycle-scooter-parts/k100-bmw-swing-arm-with-final-drive-/1171692233


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Waz

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160     Re: Transformed again on Sun May 03, 2015 12:06 pm



Waz



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The grease nipple that came with it was no good, too large I replaced this one with a smaller straight one.

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After measuring, cut the worn splines off.

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The new splines slip inside the drive shaft, the new piece has a 45deg edge so I ground the drive shaft edge to 45v deg as well leaving a nice V shape to fill with weld.

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Then ground it smooth

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easy peasy



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MartinW

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Thanks fella's looks like I'll with go with a Motobins one works out a bit cheaper. And while I'm at it  looks like I'd be best replacing the U/Joint. Waz, one question though does it need to tacked in small increments and allowed to cool between welds, therfore stopping any adverse effects on the internal rubber damper. Next question is there an alternative to the $110.00 plus freight alternative to the U/Joint I can vaguely remember a post on a possible Mercedes part fitting.
Regards Martin.


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Waz

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one question though does it need to tacked in small increments and allowed to cool between welds, therfore stopping any adverse effects on the internal rubber damper.

Yes

Next question is there an alternative to the $110.00 plus freight alternative to the U/Joint 

Yes, Tom found a cheaper replacement, CBC bearings I think.


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MartinW

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Tom I already had a look at that final drive I believe it is a 16 tooth one. Do you remember what the alternative U/Joint that you used was out of. I can borrow  a stuffed shaft from a mate, he lets me borrow bits but won't sell anything . I can do the rounds with it and see if I can get a match, I'll post the results if you can't remember.
Regards Martin


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RicK G

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If you need a good gear set the Paralever set will work if you shorten the shaft at the splines to suit. You wont get a 3.2 - 1 ratio set for paralever but I have a 3.09 - 1 set that I would part with.


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Tom FKR

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G'day Martin, the UJ I used to replace the busted one in my DS is one I got from CBC bearings: Hardy Spicer Universal Joint Kit No. K5-A702 code 03/2016 cost about $35. The hardest part of the job was getting the old UJ out from the yokes. Cheers Tom


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MartinW

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Thanks Rick I'll keep it in mind I will have time in four weeks time to check what the wear is like. I'm hoping I don't have to replace the final drive, fingers crossed. Thanks Tom, I'll start chasing one up we have a CBC bearing place in Eagle Farm, I also have a small hydraulic press which will help. I am currently waiting on an OK from the Honourable Minister for Finance and Recreation so I can order the spline from the UK. I am in the process of renovating the ensuite and for some strange reason she thinks this must take priority. :stick:Who am I to disagree, I like living.
Regards Martin.


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Gaz

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I gave Tom a hand with this job and agree that the hardest part was getting the old caps out.

We removed as much of the peened over retaining metal as we could with a small dremel bit then pushed the cross through as far as we could ...... then muscled the cap out the remainder of the way with multigrips. Hard work but worked on the first couple.

Then came one that we couldn't budge after pushing as far as we could on the press so out came the dremel cutting wheel and cut the back of the cup off which allowed all of the rollers to fall out. That made enough space for the cross to come out so we were then able to easily push out the remainder of the cap. If I was doing the job again I would go for cutting off the back of the cap straight up.

Cheers


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MartinW

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Gaz I've done quite a few car ones, and I have a press and Oxy/Acetylene and six burr grinders and a really big big hammer. So something will have to give. I'll photo the effort when I start. Rick you don't happen to have a stuffed shaft for sale it would allow me to reco it and not be off the road.
Regards Martin.


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RicK G

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No Martin I haven't got one, Charlie got the last one and it was 16 spline.
Gaz how did you centre the uni and what did you do to hold the cups in place as I don't think you would have the means to strake it.


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"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

charlie99

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hi martin .
the ones I have here are a stuffed and broken uj fingers-yolk  with 20 tooth spline
and a good front but near stuffed 16 spline  rear end

whilst I was at smithys ...recently we saw at least two types of uj yolks , with of corse different uj sizes … so get what is available and measure from there ...dont rely on only one size being used over the years

motor works advertise used drive shafts for about 95 pounds ...105 for 20 tooth

good luck mate


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MartinW

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Thanks Rick and Charlie. I saw the secondhand ones on the Motor Works site and did consider them. However it's hard to buy something sight unseen. It might be worthwhile emailing them for a report, but that will have to wait until the ensuite is finished. Has any of our UK members bought a shaft and what was it's condition?
I have been looking at secondhand shafts for a few years and every one of them was worn or really worn. In hindsight I should have bought one and reconditioned it.
Regards Martin.


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indian036

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@MartinW wrote:Gaz I've done quite a few car ones, and I have a press and Oxy/Acetylene and six burr grinders and a really big big hammer. So something will have to give. I'll photo the effort when I start. Rick you don't happen to have a stuffed shaft for sale it would allow me to reco it and not be off the road.
Regards Martin.
Been there with the car ones, and recently a tractor PTO shaft. Principle is the same, but was present at unsuccessful first go onTom’s. More difficult than a car one because everything is smaller and closer. Careful destruction as per Gaz is the removal solution. 

Installation is fine unless your destruction spread further than it should. 

Bill


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1985 K100RT  VIN 0028991  My original Very Happy   (Historic rego)
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1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
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Dai

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@MartinW wrote:Thanks Rick and Charlie. I saw the secondhand ones on the Motor Works site and did consider them. However it's hard to buy something sight unseen. It might be worthwhile emailing them for a report, but that will have to wait until the ensuite is finished. Has any of our UK members bought a shaft and what was it's condition?
I can't speak for driveshafts Martin, but I've bought a lot of s/h stuff from Motorworks and most of it arrived looking like it was almost new. I don't think you've got any worries there.


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MartinW

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Dai as soon as I get the ensuite out of the way I'll email Motorworks and see what their answer is. I might as well get all the options.
Regards Martin.


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Gaz

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RickG, the uni that Tom used was the same width across the caps as the outside dimension of the yoke so pressed in flush. We could not feel any axial play. I wasn't there when Tom secured it in place.

Martin, I fitted an aftermarket driveshaft to my K75, the one manufactured by Emerald Island and purchased through Munich Motorcycles, and have done 50,000km on it to date. I'm due a new rear tyre on that bike so will have the final drive off checking and lubing the rear splines. It was about 60% of the price of a BMW shaft and designed  as fully rebuildable. I also liked the feature of the blind cavity of the rear splines meaning the lube cannot escape. The only downside is that you have to take the swingarm out to fit it as the uni is too wide to go in the back.

Cheers


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MartinW

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Strewth Gaz more options, thanks for the update. I am going to plug the spline with silicone to stop the grease escaping. I might have to go for a ride down the beach, sit under a palm tree and mull over all the options. I do believe someone converted a Brick to chain drive.
Regards Martin.



Last edited by MartinW on Mon Jun 04, 2018 1:39 pm; edited 1 time in total (Reason for editing : Correction)


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MartinW

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Gaz I had a look at the Munich BMW site and the complete shaft doesn't seem to be listed anymore. They show the U/Joint and replacement splines. I have a mate with a collection of Bricks, none on the road. He bought a couple of incomplete parts bikes a few years ago. We pulled the shaft from one and it was stuffed. On the other one we were unable to pull the shaft right out. It would only come out as far as just before the U/Joint. So from your description it looks like it is one of the rebuild able shafts.
Regards Martin.



Last edited by MartinW on Mon Jun 04, 2018 1:35 pm; edited 1 time in total (Reason for editing : Correction)


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