BMW K bikes (Bricks)

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Ned


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@Rick G wrote:Yeah it's a design problem all the way and how BMW managed such a monumental cock up is amazing when many of the Japaneese bikes before them were quite good and apparently did their homework.
And thinking back on it the 16 spline units can't have been that good or why did they change.

And as for the TPS just feed it to the dumpster they'll eat anything, although not having the full throttle rich could cause problems with sustained high speed work which was where the L-Jetronic was at it's worst and does lean out.

Yep, CX500 production stopped in 1983. Shaft drive was a superb, most precise bit of engineering ... I just loved it.

I left it on the bike but "tuned" it out. Simply adjust the throttle off position never to activate the micro-switch. Done by simply rotating the TPS until the "off" position micro-switch never activates. That way you can keep your full throttle function. Smile

BTW for people who are not familiar with this... The TPS contains two micro switches, one for full throttle to inject about 10% more fuel into the engine (enrich function) and the other is the "throttle off" position that shuts off power to injectors. This one causes problems because it is a simple on/off thing. Effectively it stops/starts the engine thus inducing the twisting forces onto the spline each time in both directions. A pest in my opinion that has very little practical value.

    

52Back to top Go down   An oil bath for the final drive splines? - Page 2 Empty Re: An oil bath for the final drive splines? on Wed Jul 11, 2012 10:02 pm

Oldgoat

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Great idea Paul! Keep us posted on how its working for you? Thanks for posting the info about the TPS/Injection guys.
Thanks,
OG

    

53Back to top Go down   An oil bath for the final drive splines? - Page 2 Empty Re: An oil bath for the final drive splines? on Wed Jul 11, 2012 10:13 pm

charlie99

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just need to find a solution of the slop through the gearbox to the crank ......50mm rear wheel slack (between takeup )doesnt bode well for keeping that torque against the splines at a constant rate with stop go riding .

the tps solution of winding it out of effective switch position, does help .


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OAn oil bath for the final drive splines? - Page 2 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 ..
    

54Back to top Go down   An oil bath for the final drive splines? - Page 2 Empty Re: An oil bath for the final drive splines? on Wed Jul 11, 2012 10:18 pm

RicK G

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If you don't have some clearance in the dogs on a constant mesh box you will have big problems changing gears.
30-40 deg rotation on engaged gears is quite acceptable for that type of gearbox. If you don't have that much free rotation the dogs would have a very hard time trying to mesh.


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

55Back to top Go down   An oil bath for the final drive splines? - Page 2 Empty Re: An oil bath for the final drive splines? on Wed Jul 11, 2012 10:21 pm

Ned

Ned
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@Rick G wrote:If you don't have some clearance in the dogs on a constant mesh box you will have big problems changing gears.
30-40 deg rotation on engaged gears is quite acceptable for that type of gearbox. If you don't have that much free rotation the dogs would have a very hard time trying to mesh.

ahhhh thanks for that... I checked the brand new BMW on the centre stand and it just as much slop as my K100, now I know why Smile


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I reserve the right to voice my opinions on any subject known to man
Ned

05/1986 (K55) K100RS Motorsport (Europe), Production Code: 0503, 110k km, VIN:0140519 (SOLD)
1976 Honda Goldwing GL1000 (naked)
1997 BMW K1200RS red, VIN: WB10544A1VZA22667
    

56Back to top Go down   An oil bath for the final drive splines? - Page 2 Empty Re: An oil bath for the final drive splines? on Wed Jul 11, 2012 10:53 pm

charlie99

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+1 ...thanks rick


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OAn oil bath for the final drive splines? - Page 2 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 ..
    

K75cster

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Paul Thanks for posting a pic of that seal line, great topic people


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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.
    

ReneZ

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I understand the rational here, but don't agree. Hammering damage results in plastic deformation (you 'push' the material away) and I have not seen that on worn splines.
Furthermore I don't believe in the TPS cause, as it comes on again when the engine gets to 2000 rpm. The resulting braking on the engine should than wear the splines opposed of the drive side and you normally don't see anything on that side. You could have instances where the splines get loaded or not by normal road use on a bumpy surface or during deceleration where you don't close the throttle completely. Further you'd expect the rubber inside the shaft to take up some of this if not all.
Has BMW ever commented (or a dealer or similar?)?


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

Rene


BMW K100 - 1985 (0030029) An oil bath for the final drive splines? - Page 2 Rain
BMW K1200GT - 2003 (ZK01223)
    

sidecar paul

sidecar paul
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Rene,
I guess that BMW design their bikes with an expected life span of, say 5 years, so if our splines are worn out after 20........

Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015) 
....No CARS never ever!
    

ReneZ

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;-) Had a good laugh out of that one!!

Indeed, sales department overtaking the technical part....Nothing new there
Then again it was my understanding that everything was very over-dimensioned to assure longlivity to convince the boxer crowd to buy into the new bike.

Guess we'll never find out the reason for the actual construction; interesting nonetheless!


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

Rene


BMW K100 - 1985 (0030029) An oil bath for the final drive splines? - Page 2 Rain
BMW K1200GT - 2003 (ZK01223)
    

Ned

Ned
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@ReneZ wrote:I understand the rational here, but don't agree. Hammering damage results in plastic deformation (you 'push' the material away) and I have not seen that on worn splines.... Further you'd expect the rubber inside the shaft to take up some of this if not all.
Has BMW ever commented (or a dealer or similar?)?

Hi, I am a little unsure about the "rubber inside the shaft" ... is there a coupling somewhere... I guess that i am too lazy to check Smile I can't recall any couplings designed to take the sudden loads on the splines.


__________________________________________________
I reserve the right to voice my opinions on any subject known to man
Ned

05/1986 (K55) K100RS Motorsport (Europe), Production Code: 0503, 110k km, VIN:0140519 (SOLD)
1976 Honda Goldwing GL1000 (naked)
1997 BMW K1200RS red, VIN: WB10544A1VZA22667
    

RicK G

RicK G
VIP
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The shaft has an inner which has the female spline and an outer tube which has the uni joint, the two are joined with a rubber sleeve between. If you look from the rear end up into the tube you will see a gap of about 4mm which is filled with rubber to isolate any vibrations.
Please don't ask how they get it in coz FIIK


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

K75cster

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Non just wispered in my ear that FIIK is a technical term, he he


__________________________________________________
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.
    

Ned

Ned
Life time member
Life time member
@Rick G wrote:The shaft has an inner which has the female spline and an outer tube which has the uni joint, the two are joined with a rubber sleeve between. If you look from the rear end up into the tube you will see a gap of about 4mm which is filled with rubber to isolate any vibrations.
Please don't ask how they get it in coz FIIK

Oh yes, I remember now. I don't think much of that as a coupling device. I don't want to start a flame wars about this, but this is what i call a coupling system. It is a 1976 Goldwing shaft. Note spring loaded coupling that works very well. I hope that the link below works.

https://lh5.googleusercontent.com/-KqDEt1ezSSQ/UAOy3QnTQBI/AAAAAAAACYg/Zno5lhAWbds/s517/Clipboard01.jpg


__________________________________________________
I reserve the right to voice my opinions on any subject known to man
Ned

05/1986 (K55) K100RS Motorsport (Europe), Production Code: 0503, 110k km, VIN:0140519 (SOLD)
1976 Honda Goldwing GL1000 (naked)
1997 BMW K1200RS red, VIN: WB10544A1VZA22667
    

65Back to top Go down   An oil bath for the final drive splines? - Page 2 Empty Re: An oil bath for the final drive splines? on Mon Jul 16, 2012 10:44 am

RicK G

RicK G
VIP
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The BMWs have exactly the same thing internal to the gearbox on the input shaft and have had eversince I have been pulling them apart.


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

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