BMW K bikes (Bricks)

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1Back to top Go down    Installing a full new clutch on Sat Jul 20, 2013 10:04 am


This is just a hypothetical question, I don't need a clutch kit.

But if someone had to install a full clutch kit, which is normally from the spring plate onward, what do you do about balance ?  How do you balance the kit or do you have to ?


2Back to top Go down    Re: Installing a full new clutch on Sat Jul 20, 2013 6:51 pm


From what I have read you have to balance the clutch.
Unless you put it back together without balancing the clutch. In that case you don't have to balance it.
Seems they come balanced from the factory, but that is probably the last time it is done.
Plenty of posts here where the clutch has just been put back on with no ill effects.

1986 K100RT VIN 0093801K100RT with summer fairing for a northern visitor

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321

3Back to top Go down    Re: Installing a full new clutch on Sat Jul 20, 2013 8:37 pm

RicK G

This is usually no big deal but if you pull the old clutch of then take care to mark it but on several occasions I have washed the marks of or used a secondhand set of plates to no ill effect.
What I consider happens is that in the factory there are a team of gnomes that put clutch packs together and check the ballance and if ok mark them and fit them. The fixed and pressure plates are very obviously ballanced as an item to within say 5 gms and then are assembles and rechecked, if the 5g out all occurs at the same sopt then no go so try a different combo from the big box ot plates.
If the ballance is out and you get vibration then move one of the plates 120° to the rest.

"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

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

4Back to top Go down    Re: Installing a full new clutch on Sat Jul 20, 2013 11:39 pm


Life time member
Life time member
Regarding the installation of the new clutch
Mark old clutch´s assembly regarding the output shaft
Take out the old clutch assembly
Find old assembly´s mass center´s radial position, so you  can refer it to the output shaft .
Assemble the new clutch, balance it and find it´s mass center´s radial possition
Install the new clutch assemble  with it´s mass centre at the old one´s radial position
Pray the gods for it not to vibrate.
Best regards

1988 K100RS SE/ABS

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