BMW K bikes (Bricks)

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club_c

club_c
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I have a better output shaft that I'd like to put into the '85 K100RS, just a 6 rivet swap, but I feel the new one is better. Anyhow, I'd like to do this with the engine in the frame if possible. What steps should I take? I'll have to pull the FD and trans obviously, but can I then work under the engine to remove the output shaft, or am I doomed to pull the motor?



Last edited by club_c on Tue May 15, 2012 12:34 am; edited 1 time in total


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"There's never enough time to do it right, but there's always time to do it over."

1988 K100RS SE VIN 01477554
    

charlie99

charlie99
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bell housing might be the restriction but maybe possible


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow to swap out output shaft, engine in? [SOLVED] Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

Inge K.

Inge K.
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First buy enough beer, then check this document.


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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

yankeeone

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Inge, nice find on the output shaft document .

    

charlie99

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sounds like a slab job (24 stubbies in a slab ) giggle


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow to swap out output shaft, engine in? [SOLVED] Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

Inge K.

Inge K.
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24 of these ones would be the correct amount:

How to swap out output shaft, engine in? [SOLVED] Hpim0910


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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

yankeeone

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now thats output!

    

charlie99

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How to swap out output shaft, engine in? [SOLVED] 44271 .....thanks inge ....read my mind ...giggle


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow to swap out output shaft, engine in? [SOLVED] Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

club_c

club_c
Life time member
Life time member
Well I have a good 1/3 of the bike disassembled and have had a thought... how will I support the engine in the frame if I remove the gearbox and intermediate housing? Normally I would support from underneath, but in this case I need to remove the sump to access the output shaft. Any clever ideas before I abandon plan A and remove the engine?


__________________________________________________
"There's never enough time to do it right, but there's always time to do it over."

1988 K100RS SE VIN 01477554
    

Inge K.

Inge K.
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A piece of plywood, using some of the intermediate flange mounting points.
Some length of ~2"x2" (or whatever) across the frametubes.

How to swap out output shaft, engine in? [SOLVED] Suppor10


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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

ReneZ

ReneZ
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Lay the bike on its side?


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Greetings from Florida! Having a 'new' K  :cyclops:    Surprised-o: 

Rene


BMW K100 - 1985 (0030029) How to swap out output shaft, engine in? [SOLVED] Rain
BMW K1200GT - 2003 (ZK01223)
    

Dennis

Dennis
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Yes, you'll need to make a support bracket to pick up some of the holes at the rear of the engine, above the split line. You may also consider removing and examining/cleaning the starter sprag clutch while you are in this far. It may well be OK, but it would pay to check it out. Make sure you replace the O ring at the crankshaft nut, the nut is also supposed to be replaced, and there is a special tensioning procedure (in the manual).

    

Inge K.

Inge K.
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@Dennis wrote:Make sure you replace the O ring at the crankshaft nut, the nut is also supposed to be replaced, and there is a special tensioning procedure (in the manual).

I may add that also the compression ring between the O-ring and nut is supposed to be replaced.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

K75cster

K75cster
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If you remove the air filter base there be a couple of bolt holes you can run a strap up to the frame rail from. The hardware store should have a metal strap for you


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Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

club_c

club_c
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Well that was a much more time consuming job than I first thought. Thursday evening, all day Friday and finished up Saturday morning. And a major difference in cold start up, now it is quiet! I didn't realize how noisy it was until the output shaft was swapped out. As was mentioned elsewehere, it is a very deep part to change out, but I was able to do it without removing the motor. Thanks to Inge for that service bulletin. The engine support ideas were all excellent, I went with a hybrid approach as shown below. My saddest moment was removing the oil pump that had given me so much leakage grief. I haven't taken it out on a good ride yet, but up and down the street it seems to be sealed. Thanks to all who contributed.

How to swap out output shaft, engine in? [SOLVED] Engine10


__________________________________________________
"There's never enough time to do it right, but there's always time to do it over."

1988 K100RS SE VIN 01477554
    

charlie99

charlie99
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onya clubbie !!!

wanna come and help me do mine ? giggles

im guessing ill be off the road for weeks


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow to swap out output shaft, engine in? [SOLVED] Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

ReneZ

ReneZ
Life time member
Life time member
Noted your picture; do you have one from the left side of the bike? Or do you know how far the outlet pipes stick into the muffler? Strange question maybe, but I can't get the muffler off and wonder if my repair of a cover plate attachment with a well nut is the problem............ Evil or Very Mad


__________________________________________________
Greetings from Florida! Having a 'new' K  :cyclops:    Surprised-o: 

Rene


BMW K100 - 1985 (0030029) How to swap out output shaft, engine in? [SOLVED] Rain
BMW K1200GT - 2003 (ZK01223)
    

yankeeone

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the pipes go in to the muffler about 2 inches

    

yankeeone

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Club_c,
Did you notice how there is much less play in the drive train?

    

charlie99

charlie99
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good point yankee .....clubbie is there any difference in the free play of the back wheel whilst in gear ?

(it was pretty common to see about 50 mm from a survey )


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHow to swap out output shaft, engine in? [SOLVED] Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

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