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K100-forum.com » Technical, repair and troubleshooting » Engine and transmission » Drive shaft universal joint

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1Back to top Go down   Drive shaft universal joint Empty Drive shaft universal joint Tue Jun 08, 2010 6:45 am

robinm

robinm
Silver member
Silver member
Has any body replaced the universal joint on a K driveshaft?, if so what is the size of the universal joint? I have a shaft here that I intend to put a new spline on, but the UJ is not too good and I would like to replace that at the same time.

    

2Back to top Go down   Drive shaft universal joint Empty Re: Drive shaft universal joint Mon May 12, 2014 12:09 pm

Fliggy

Fliggy
active member
active member
Did you ever get e reply to your post? I need to do the UJ on my drive shaft; can you give any pointers?

Many thanks.


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Fliggmeister :suspect:
1991 K100RT (iC) ViN:0097731
    

3Back to top Go down   Drive shaft universal joint Empty Re: Drive shaft universal joint Mon May 12, 2014 9:21 pm

Rick G

Rick G
admin
admin
You need the right jig to centre the joint and at least a 10 tonne press


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"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

4Back to top Go down   Drive shaft universal joint Empty Re: Drive shaft universal joint Fri Jun 27, 2014 4:26 pm

Fliggy

Fliggy
active member
active member
Right, I haven't got one of those at the mo. Thanks anyhow.


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Fliggmeister :suspect:
1991 K100RT (iC) ViN:0097731
    

5Back to top Go down   Drive shaft universal joint Empty Re: Drive shaft universal joint Fri Jun 27, 2014 6:36 pm

billtr96sn

billtr96sn
Silver member
Silver member
Having lookedat pictures of the UJ it looks no different to a standard car type on the propshaft. I have changed hundreds of those with nothing more than a drift, large hammer, a good vice and some circlip pliers. No jigs etc.


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Something witty is supposed to go here... help!! Drive shaft universal joint Uk-log10
http://www.billsbikechat.co.uk
    

6Back to top Go down   Drive shaft universal joint Empty Re: Drive shaft universal joint Fri Jun 27, 2014 7:12 pm

AL-58

AL-58
Life time member
Life time member
Its not held in by a circlip, BMW in their desire for spare parts revenue designed it to be non-replaceable.

Instead it's crimped in at the yokes.  

The replacement process I've heard is:

  1. grind away the crimping
  2. press out the old UJ
  3. Press the new UJ into place being careful to centre it (you have no circlip grooves to use as a guide.
  4. place suitable sized flat washers over the end of the UJ caps
  5. Tack the flat washers into place with a MIG welder (welding direct to the UJ caps would put too much heat into them and probably damage them)


I only know this from R100GS circles where the front UJ is expected to fail from about 60,000kms onwards.

Al


__________________________________________________
'93 K1100LT
'08 F650GS (798cc)
'19 R1250RS
+ another boxer engined motorcycle and sidecar

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

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