Brake discs

[Dom]

Right well I have a floating disc which is floating way too much. Could someone with more knowledge than me confirm/disagree with the following two points?

"It's really best to replace both discs at once." (As in both front discs)

"If you're replacing the discs you should replace the pads too".

I'm sure there's some sense in both of these, but lets say you're in a position where you have this combined with an expensive insurance bill and MOT all in the same month and your bank balance is a bit too close to the red for comfort. What if I ignore some/all of that advice?
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[Guest]

[ZRX61]

[Guest]

Why?

How does it know that it's got new pads on old discs, or vice-versa?

[sickpup]

[Kickstart]

Hi

I would say if you can replace both disks at the same time that is best (or get rebuild kits, putting new disks onto the existing carriers), but I have to admit having replaced a single disk before now (I had 2 pairs of disks, both of which had one warped).

As to fitting new pads at the same time, definatly. The old pads will wear the new disks to the shape of the old ones.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Nath]

If there is a lot of life left in the pads, what's to stop him attacking them with a file/wet and dry to make them square and smooth again?
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[Dom]

Cheers for the replies. I'm going to have to make a decision pretty soon as I'm sure the bike will fail the MOT that it needs by the end of the month if I don't do anything.

I actually have already replaced the disc in question once as the original suffered the same problem. The second hand disc I picked up on ebay has now gone the same way after a winter's use, evidently the OEM discs are up to the standard Suzuki levels of durability/build quality.
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[Guest]

I can't see it myself - pads are softer than discs. In an ideal, money-no-object world you'd change the lot. But if you've got a set of 1000 mile old pads and you have a disc-lock moment, are you really going to change the undamaged disc and the pads?

Don't forget that a brand new bike takes a while to bed the brakes in, the pad faces are certainly not matched to the discs, there's always the manufacturing tolerances to take in.

[Kickstart]

Hi

Pads these days are not that much softer than disks.

How are these disks getting play? What is actually wearing on them?

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Dom]

It's the bobbins/whatever they're called that have had it, I'm told they can't be replaced on these discs for some reason.

The disc has still got some life in it and afaik is otherwise in good nick.

Edit: The play is up, down, left, right - you name it. Nowhere near an 'acceptable' level of movement.
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[Kickstart]

Hi

Try https://www.stealthproducts.co.uk/ for some replacement bobbins. Suzuki won't sell them to you.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[sickpup]

On Suzuki's the carrier normally wears out.

The boys at ABE on 020-8858-9052 may be able to help you out.

[Dom]

Thanks for the help guys. Think I'm going to just pick up a 2nd hand disc and new set of pads. Don't have the know how to fix the disc myself and tbh a good second hand one will probably work out at a similar price anyway.
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