BMW K bikes (Bricks)

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1Back to top Go down   K75C rear wheel spacer. Empty K75C rear wheel spacer. Sun May 08, 2022 5:54 am

Rockman

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I took my 1987 K75C for its first run today. It ran very well but I noticed some squealing when I put the rear brake on. When I got home I removed the rear wheel and it looks like the wheel is touching the edge of the brake pads.

I assume there should be the standard BMW spacer between the wheel and the hub. Can someone confirm this please?

    

2Back to top Go down   K75C rear wheel spacer. Empty Re: K75C rear wheel spacer. Sun May 08, 2022 6:11 am

charlie99

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all bevel boxes k75 - k100  should have the spacer , im guessing the brake disk is touching the calliper body as brakes applied ,?  but could be a stuck piston internal to the calliper causing the noise ?


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OK75C rear wheel spacer. 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 ..
    

3Back to top Go down   K75C rear wheel spacer. Empty Re: K75C rear wheel spacer. Sun May 08, 2022 11:17 am

TacKler

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As the 75C has a drum brake and not a disc brake, it has the different rear wheel.  Due to the design the four wheel bolts are shorter and a spacer is not fitted.  

There is a bit in the Haynes manual about fitting a rubber damper around the rearmost return spring to prevent brake squeal.  There is a bit more detail to it than that if you need to have the damper fitted.  You may have to replace both springs as well.  

Do you have a Haynes manual for K bikes?



Last edited by TacKler on Sun May 08, 2022 11:42 am; edited 1 time in total


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Red 1991 K75S
    

4Back to top Go down   K75C rear wheel spacer. Empty Re: K75C rear wheel spacer. Sun May 08, 2022 11:40 am

Point-Seven-five

Point-Seven-five
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Check the shoes for glazing.  A light scrub on the shoes and the drum with 400 grit to break the glaze.  A very light film of spline lube on all the moving parts being very careful to keep it off the shoes and the drum.


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Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
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
    

5Back to top Go down   K75C rear wheel spacer. Empty Re: K75C rear wheel spacer. Sun May 08, 2022 12:22 pm

Laitch

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TacKler wrote:. . . fitting a rubber damper around the rearmost return spring to prevent brake squeal.  There is a bit more detail to it than that if you need to have the damper fitted.  You may have to replace both springs as well.
The condition is described in this BMW service bulletin.


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1995 K75 81,000 miles
K75C rear wheel spacer. Usa-lo10
    

6Back to top Go down   K75C rear wheel spacer. Empty Re: K75C rear wheel spacer. Sun May 08, 2022 10:21 pm

Rockman

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Really none of these apply. It has a drum brake and the EDGE of the shoes is touching the inner part of the wheel centre like the wheel is going too far over the hub. Actual brake shoes are ok and I did de-glaze them. I'll get a photo later to show what I mean

UPDATE:
Gaz has supplied me some info on centreing the brake shoes. I'll give this a go when I get a chance.

ANOTHER UPDATE:
Problem solved.

    

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