BMW K bikes (Bricks)


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1Back to top Go down    Funny brake noise on Sun Dec 18, 2016 2:45 am

AL-58

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This might help someone elses troubleshooting.

My RT has had a light rythmic rattle coming from the brakes for a while, its been driving me mad. Also had sqeualing pads.

I'd already cleaned the pad backing and applied an anti squeal coating (this worked), sanded and cleaned the pins that the pads slide on and applied a thin smear of moly to the pins where the pads slide to help the pads move, cleaned the inside of the calipers for the same reason. I know that some upgrade to stainless caliper pins, but we generally don't get the corrosion problems here in OZ to warrant it. All this improved the brake performance but didn't get rid of the ticking.

I noticed that one of the 'W' shaped spring that holds down the centre pin on top of the pads was slightly loose. So I removed it and straightened it a little to put pressure on the tapered centre pin the way it was originally. The ticking noise is now gone, it was simply the W spring and the centre pin moving a little.

Al


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'87 K100RS/HRD sidecar (1100 motor)sc25
'92 K100RS-16v (Paint it Black)

'87 K100RT with Paralever backend

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

    

2Back to top Go down    Re: Funny brake noise on Sun Dec 18, 2016 4:37 am

indian036

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Easy when you have the clues. Smile

Good to know. Thanks, Al.

Bill


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1985 K100RT VIN 0028991 My original Very Happy (Historic rego)
1985 K100RT VIN 0029036 BOB the Blue Old Bike (Historic rego)
1990 K100LT VIN 0190452 Work in progress
1984 K100RT VIN 0023022 Work needing lots of progress

1986 K100RT VIN 0090542 Work needing lots and lots of progress
1993 K1100LT VIN 0183046 Work in progress
1993 K75S VIN 0213045 Newest toy, slightly non-original
    

3Back to top Go down    Re: Funny brake noise on Sun Dec 18, 2016 7:01 pm

K75cster

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Very Happy


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Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt

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.
    

4Back to top Go down    Re: Funny brake noise on Sun Dec 18, 2016 8:29 pm

blaKey

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Thanks for the tip Al.


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Neil
K100RS 1986 RED!
K100RT 1987 (now nekkid with red bits)

Remember Rule No. 6
    

5Back to top Go down    Re: Funny brake noise on Tue Dec 20, 2016 5:48 am

Dai

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Just to add to Al's comment: don't ever be tempted to leave the anti-chatter kit out of the calipers. You'll drive yourself nuts trying to figure out where your fairing is loose!! DAMHIK. As to why I did it... maybe the logic will amuse you.

Guzzis and bricks both use P8 calipers
Both my Guzzis and my brick run cast-iron discs
If you leave the anti-chatter kit out of the Guzzi calipers, no problem
So leaving the anti-chatter kit out of the brick calipers shouldn't be a problem
WRONG!!!!!! Embarassed Embarassed


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

6Back to top Go down    Re: Funny brake noise on Tue Dec 20, 2016 6:22 am

92KK 84WW Olaf

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@Dai wrote:Just to add to Al's comment: don't ever be tempted to leave the anti-chatter kit out of the calipers. You'll drive yourself nuts trying to figure out where your fairing is loose!! DAMHIK. As to why I did it... maybe the logic will amuse you.

Guzzis and bricks both use P8 calipers
Both my Guzzis and my brick run cast-iron discs
If you leave the anti-chatter kit out of the Guzzi calipers, no problem
So leaving the anti-chatter kit out of the brick calipers shouldn't be a problem
WRONG!!!!!! Embarassed Embarassed

Someof the R bikes also use the same calipers, mounted the other way round so a right front K caliper is a left front R caliper. Not sure which way they mount on the Guzzi but even the direction change can make a difference when it comes to noise or a harmonic frequency occurrence. My local Honda main dealer also maintains some of the police bikes and had pads in stock formy brick at a tyre change having noted they were the same ones. It helps that he is also a brick owner!.

For what its worth I would also remove and clean the pins, they are stainless but a light sanding smooth is a big help.


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500miles
    

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