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Discussion Starter · #1 ·
Acapulco, Mexico

Hi,

This is my first post

I love BMW motorcycles, this is a great place to learn and share about it

English is not my fisrt Language, but I will try

I have a 57 r50, 81 R100rs (my favorite), 88 gs and 1998 K1200RS

I have a clutch problem with the K1200rs, I bought this bike about a year ago, I bought it with 9500 km on odometer, the bike is practically new, Im the second owner, now the bike have 19000 km.

I made a 600 km trip and about 50 km to finish my trip, the clutch begin to stall, but I'm in the midle of nothing, no mobile reception, then I continue using the bike, I arrive to my destination but clutch is useless.

Today I took out the clutch and is (look the photos )








I already bought the clutch actuatot and seal

what more do I need ?


flywheel seal
clutch disc

let me know
thanks and regards
 

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You will have to replace just about all the clutch parts due to the heat damage.

Remove the clutch drive plate and replace the engine oil seal and the O-ring. Caution, the plastic thrust washer is easy to break after it has been heated, best to get a new one of those too! Hope you have the service manual information, as putting the drive plate back requires specific torque of the large nut (get a new one of those also, they are a one time use, prevailing torque type nut), then turn it 60 degrees further, which fortunately is one flat of the nut, you do not need the BMW special angle measuring tool! You will have to make a bar to go across the drive plate, held with two of the bolts, which will rest on the bosses inside the housing to allow you to remove and replace the large nut.

Also, while the transmission is out, replace the front and rear input shaft seals, and the output shaft seal.
 

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Yep...you get to buy the whole shooting match (every part that is a "wear" item). This is a lot of work, so do not try to save a little money and use old parts that are worn out. Good luck!
 

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Discussion Starter · #4 · (Edited)
Thanks for your answers

Yes, I have the manual, Lucky, I have a copy in my notebook.

I don't have the etk with me

1.- could you please help me with bmw numbers

2.- what is the size of drill to make the weeping hole ?

3.- what do you believe was the problem that cause this

4.- do i need to replace the thrust rod and what is the felt ?


REQUIRED PARTS ( I download the bobs k parts pdf cataolog)

1.- 21211451274 large forward lock ring - ok
2.- 21212332974 pressure plate- do I need to replace it ?
3.- 21217670455 clutch friction plate - ok
4.- 21212333472 presure ring do i need to replace it ?
5.- 11211460456 fly wheel oring - ok
6.- 11211460797 flywheel nut - ok
7.- 11212333472 o ring compression ring - ok
8.- 23211230440 felt - ok
9.- 23142333154 gear postion switch - ok - my mistake
10.- the other clutch part - spring diafragm ?

what about the trans seals numbers ? (please )
 

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eduardocastrejon said:
Thanks for your answers

Yes, I have the manual, Lucky, I have a copy in my notebook.

I don't have the etk with me

1.- could you please help me with bmw numbers

2.- what is the size of drill to make the weeping hole ? I used 5/32", but it is not critical. Anything between 1/8" to 3/16" will work, but too large will more readily let in dust/dirt. The hole has to be big enough to allow leaking brake fluid to escape readily.

3.- what do you believe was the problem that cause this
It does not look like clutch slave cylinder failure, but could be engine output shaft O-ring leaking. These get hard and crack.

4.- do i need to replace the thrust rod and what is the felt ?
Thrust rod normally does not fail. Look for any signs of unusual wear, if not worn, it is OK. SOME have a groove near the rear end in which a felt ring fits. If your rod does not have this groove, you do not need the felt ring.



REQUIRED PARTS ( I download the bobs k parts pdf cataolog)

1.- 21211451274 large forward lock ring - ok Should not need. Just a steel spacer.
2.- 21212332974 pressure plate- do I need to replace it ? Yes, Heat damaged
3.- 21217670455 clutch friction plate - ok
4.- 21212333472 presure ring do i need to replace it ? Yes, Yes, Heat damaged
5.- 11211460456 fly wheel oring - ok
6.- 11211460797 flywheel nut - ok
7.- 11212333472 o ring compression ring - ok
8.- 23211230440 felt - ok
9.- 23142333154 gear postion switch - ok - my mistake
10.- the other clutch part - spring diafragm ? 21217699214, Due to likely heat caused spring relaxation, I would replace it. You need all the spring pressure you can get.

what about the trans seals numbers ? (please )
Front Input Shaft Seal 23127705086
Rear Input Shaft Seal 23127705085
Output Shaft Seal 23121340324
I have ETK, but got these part numbers from www.realoem.com, as the database there is up to date.
 

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Eduardo,

I was just wondering if you have an update on your clutch repair? I hope that things are going well and that the repair is progressing well.
 
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