How did you fix your splines?

[charliebrownclown]

Hello Everyone


Well got my new tires and thought i better lube the splines and what i found was not good at all.
Just wondering how you guys did it. I have read many many posts about it. Interested in your results and advice.
Especially if you live in Canada.


Thanks

[The Mighty Gryphon]

Wow, those look pretty bad.  I've not been down that road, but if they were mine I'd be looking for a good pre-owned final drive and a new drive shaft.  With any luck you can be back on the road for under $600 with parts that should get you another 50-60k miles, maybe more if you keep up the maintenance.

[charliebrownclown]

I have been looking and there doesn't seem to be any good used parts out there. I'm going to bring the the parts to some local machine shops tomorrow to get some estimates.

[Chaos]

I copied and saved this from a post not too long ago, sorry did no include the OP;

As I attempt to find a suitable (and reasonable $) repair for the splines on a K75RT driveshaft/final drive, I’ve come across a lot of older information, so I thought I’d give a current update of where we are today (3/14/2018). Please let me know if I have missed anything!!


Brand new OEM:
Buy a new driveshaft (~$365) and a final drive (~$824) from BMW

Repair:
Hansen’s BMW in Medford, OR - they repair the final drive only. The base price for new pinion shaft splines ONLY is $220 if you do some disassembly work. On an older final drive (above 30k or so), they will also replace the pinion gear and seals. They also sell a brand new BMW driveshaft with a 2-year warranty (~$330 for driveshaft because of 10% discount w/drive repair).
Side note: Craig (proprietor of Hansen's) also said that he accepts final drives from BMW and Independent Shops, so if you don't want to tackle it yourself, you can have someone else do the dirty work for you. He tries to get them back out of the shop in 2 weeks or so.

Bombers Beemers in Durham, NC
They offer a full rebuild of the final drive with new pinion shaft spline, new drive shaft, clean and reseal. ($989.95 with 1yr/12k warranty - it is noted that the metal in the new drive shaft splines are supposedly better quality than original)
 

Used:
Check the MOA Market place, iBMWR, or eBay
Check your local swap meet or motorcycle parts breaker
**I’ve noticed that the quality on eBay has not been the best, as most are used parts with significant wear. You can see that some eBay sellers deliberately choose not to show the actual splines, in an effort to hide their poor condition!!**

Other repairs:
MachineService in WI - They only repair the u-joint on the drive shaft, which isn’t generally a problem on the K75/K100
Oshmo in Van Nuys, CA and Hendersen Precision in Big Oak Flat, CA - Seem to only repair /5 /6 /7 model final drives or u-joints in R100's

Old places no longer providing new/repairs:
Brand new:
Ted Porter’s Beemershop and Bombers Beemers sold the Emerald Island (EI) rebuildable driveshaft, but they are backordered for redesign (no known date of when that will be)

Repairs
Bruno’s Repair in Canada (closed down last year)
Motobins.co.uk Driveshaft repair (Website notes UK Customers only – have not heard back from my i

[charliebrownclown]

I have tried to find new pinion shafts with no luck I will have to check out this hansons place. When I check bmw OEM parts I can't find a part number for the pinion.

[Inge K.]

When I check bmw OEM parts I can't find a part number for the pinion.

......cause they are not sold as a single part, only together with the crown wheel as they are a matched pair.

[charliebrownclown]

Well that does make sense. I had forgotten ring and pinion were always sold together. Well the cost of that part just got a bit bigger in my head.

[gph67]

I went the Hansen BMW route. I recommend them highly. Do the service and should never have the problem again.

[Mongrel]

So while there appear to be several places still doing final drive rebuilds, does no one rebuild drive shafts anymore?

I have a worn spare (the original I replaced) and was hoping I might be able to send it away to be rebuilt at Iron Bridge with the extension which is supposed to nearly resolve the issue of spline wear, but Bruno's is closed now. Is there no one anywhere who does this sort of rebuild anymore?

[The Mighty Gryphon]

I would expect that you could take your old drive shaft and the new spline to any machine shop to have the parts fitted and welded together.  The machining should be a straightforward lathe job.

[charliebrownclown]

Moto-bins drive shaft spline sleeve  78$ + shipping +find a machine shop to weld it on the old drive shaft
And Hansens BMW pinion rebuild if you ship them only the pinion shaft for 220$ + shipping

This seems like the cheapest. I think this is what I will have done.
Unless I can find good used parts

Anybody have experience with the moto-bin part.

[jaxon]

It's info like this that makes a motobrick donation worthy.

[Mongrel]

So the moto-bins spline shafts are of a more durable material? Seems that way?

In any case, I see moto-bins is now offering a rebuild service as well. https://www.motobins.co.uk/bmw-parts.php?model=K%20Series&bikeref=K100

Given the low value of the GBP these days, that might beat out Hansen's price for those of us in Canuckistan...

[charliebrownclown]

The drive shaft rebuild is for UK customers only

[Laitch]

Moto-bins drive shaft spline sleeve  78$ + shipping +find a machine shop to weld it on the old drive shaft
Anybody have experience with the moto-bin part.

So the moto-bins spline shafts are of a more durable material? Seems that way?

http://www.k100-forum.com/t7226-shaft-and-drive-splines#83122

[charliebrownclown]

Thanks for the link.

[Mongrel]

The drive shaft rebuild is for UK customers only

Well, I know more than enough UK folks that I could loop it through if I had to. All depends on the math of doing that vs a local machine shop doing the work.

[The Mighty Gryphon]

Well, I know more than enough UK folks that I could loop it through if I had to. All depends on the math of doing that vs a local machine shop doing the work.

You don't indicate where you live, but if it's in the U.S., it would probably be cheaper to have a local shop do the work.  If you need your shaft repaired, get the spline and take it and the shaft around to a couple shops to have it installed.  I am pretty sure that they can do it for less than Moto-Bins, and you won't have to pay the shipping from wherever it is you live. 

The install looks like it just involves cutting off the old splines, boring out the old shaft to a press fit for the new spline and welding the new spline.  I'm not sure, but there might be some additional heat treating of the repair after the welding, (you might want to ask Moto-Bins for instructions for the installation).  All in all, I doubt it would cost more than the shop's minimum for the job.  If you know someone with a lathe, they could probably do the job in under an hour.

[bocutter Ed]

... wherever it is you live.

... about 2 miles south of the F&C place. Damn Gryph, we've lunched together.  :hehehe

[The Mighty Gryphon]

... about 2 miles south of the F&C place. Damn Gryph, we've lunched together.  :hehehe

I was asking the Mongrel.

[Martin]

If you do get the fitting instructions fo the splines I would appreciate if you would post it. I  have always wondered how they weld it without setting fire to the rubber insert or melting it?  :dunno
Regards Martin.