BMW K bikes (Bricks)

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1Back to top Go down   K100 shim removal Empty K100 shim removal on Sat Nov 14, 2020 5:51 pm

allemande

allemande
active member
active member
Hello all,
I own two high mileage 1985 K100 (RS and RT), amongst other bikes. I'm in the process of checking valve clearances. All valves on both bikes are tight and need adjustment. I'd like to remove all shims and then see if any of the shims can be swapped to a new location, before ordering extra shims? Or would I cause damage to the valves by rotating the camshaft with a wrench without shims in place? What about having shims re-machined by a professional machine shop? Better to buy new?

Thanks!


__________________________________________________
1988 BMW K100RS (ABS); 2002 BMW R1150RT (Evo ABS)
http://www.recordingstudio330.com
    

2Back to top Go down   K100 shim removal Empty Re: K100 shim removal on Sat Nov 14, 2020 5:59 pm

robmack

robmack
Life time member
Life time member
Why not systematically remove, record and replace each shim in sequence, noting in a chart the printed shim thickness as you progress through all 8 shims?  Then, measure the gaps, do your math and that will provide a final strategy to swap shims where possible and replace those that cannot be swapped.  Record your numbers in this chart:  http://www.kbikeparts.com/classickbikes.com/ckb.tech/0.ckb.tech.files/4valves/4valves.htm

The surface of the shims are hardened and machining them will compromise the hardening, causing premature degradation.  Better to shop new.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

3Back to top Go down   K100 shim removal Empty shim replacement on Sat Nov 14, 2020 6:09 pm

allemande

allemande
active member
active member
Thanks for your reply. Sure, you could do that but that doesn't answer my question... Very Happy I was curious about whether it is ok to remove a shim and then rotate the camshaft.


__________________________________________________
1988 BMW K100RS (ABS); 2002 BMW R1150RT (Evo ABS)
http://www.recordingstudio330.com
    

4Back to top Go down   K100 shim removal Empty Re: K100 shim removal on Sat Nov 14, 2020 6:16 pm

robmack

robmack
Life time member
Life time member
I can't believe that it is a good idea to do that.  The cams might contact the bucket edges and potentially damage them if so.  I'm sure others will pipe up and possibly counter that opinion.

BTW, you can use Suzuki shims in these engines. Suzuki shims might be more readily available.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

5Back to top Go down   K100 shim removal Empty Re: K100 shim removal on Sat Nov 14, 2020 7:37 pm

RicK G

RicK G
admin
admin
@robmack wrote:I can't believe that it is a good idea to do that.  The cams might contact the bucket edges and potentially damage them if so.  I'm sure others will pipe up and possibly counter that opinion.

BTW, you can use Suzuki shims in these engines.  Suzuki shims might be more readily available.
Don't rotate the engine without the shims it will cause damage. Kawasaki shims also fit but beware of the Yamaha shims they have a small champfer which I believe will cause premature wear on the cams. Always measure the shims at the centre using a micrometer because vernier calipers will give a false reading on worn shims.


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

6Back to top Go down   K100 shim removal Empty Shim removal on Sat Nov 14, 2020 8:19 pm

allemande

allemande
active member
active member
Thanks for the replies. I just wanted to make sure that it was a big no-no....


__________________________________________________
1988 BMW K100RS (ABS); 2002 BMW R1150RT (Evo ABS)
http://www.recordingstudio330.com
    

7Back to top Go down   K100 shim removal Empty Re: K100 shim removal on Sun Nov 15, 2020 12:42 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

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