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Author Topic: Disc brake bobbins  (Read 464 times)

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Offline kramrehsul

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Disc brake bobbins
on: 23 Jun 20, 09:36:57
So how loose/tight should the brake disc bobbins be? I've previously posted on here re squeaky front brake and one of the suggestions was to check them. I've cleaned them up using the nut and bolt method and the squeak has gone. However, there is still no way I can move/spin the bobbins with my fingers although they turn easily when using the nut and bolt. Booked into dealers to get squeak sorted out but now that's gone I might cancel depending on what is the norm for bobbin tightness. Hope this makes sense.

#1

Offline mdr1970

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Re: Disc brake bobbins
Reply #1 on: 23 Jun 20, 10:51:02
You definitely cannot rotate with just fingers!!!

At long as they're clean and rotate with washers and nut bolt  :028:
2014 Z1000sx Blacknificent Made in JAPAN, Perfected in the UK   :038:   :008:

#2

Offline whyhaveone

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Re: Disc brake bobbins
Reply #2 on: 24 Jun 20, 12:58:12
*Originally Posted by mdr1970 [+]
You definitely cannot rotate with just fingers!!!

At long as they're clean and rotate with washers and nut bolt  :028:

Agreed!
Kawasaki: 1975 250-S1C; 1977 Z650-B1; 1980 Z1000 MKII A3; 2011 ER6n; 2013 Z1000SX ABS; 2016 Z1000SX ABS Tourer, 2020 Ninja 1000SX Performance Tourer.

#3

Offline Megaross

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Re: Disc brake bobbins
Reply #3 on: 13 Jul 20, 01:47:25
You wouldn't want to rotate by fingers, they'd be too loose then.

Had to replace the discs on my tiger once because the bobbins were flapping about like a tarts knickers and making a truly awful racket  :008:

#4

Offline ZPETE

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Re: Disc brake bobbins
Reply #4 on: 13 Jul 20, 06:25:58
I saw a video but cant remember where, of a bloke insisting that you should NEVER play with disc bobbins and they don't need to rotate and he was very adamant about this. He seemed to know what he was on about.
Just saying what I saw, not that it was necessarily true.
Btw, I have never touched the bobbins on any bike I have owned and don't know anyone that has.
Like I said,,,,,just saying.

#5

Offline Megaross

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Re: Disc brake bobbins
Reply #5 on: 14 Jul 20, 06:24:01
Oh absolutely, bobbins are about fore and aft allowing the disc to float with any brake piston misalignment, heat expansion etc.

I haven't touched them on mine either. You shouldn't need to to be honest

 



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