Bedding in new brakes / brake disk material

[talkToTheHat]

So I had a caliper seize and cook a brake disk on the bandit so badly it dished line a dinnerplate. Both front calipers overhauled, new pads, new discs (EBC X series) and a replacement caliper hanger later (ouch, right in the wallet) bike is back together. The brake feel is different though, and this is after a few hundred miles. The feel is different and I'm not sure if it's down to being new, or the disks being a different material. Rather than feeling the bite instantly, it seems to build in the first fraction of a second after applying brakes, kind of like an undrilled disk in the rain feeling. Not as pronounced, it's a small thing and I'm getting used to it. I just want to know if it's a "new" thing or a "materials" thing.
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Bandit. does. everything.

[davebike]

What pads have you fitted??
What pads were you using ??
If you haven't changed to pads that is the problem!
Hard pads take time to bed in
Soft pads can do this
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Dave
NC750Xdct + others at work !
davebike1@gmail.com

[Beehive Bedlam]

Inb4 'i want compensation from garage'.

[Robby]

Any bedding in would have happened by now. I would be looking at the calipers to see what isn't moving freely. Bits to check:
1. Pan retaining pins and anything the pad slides on. The pad needs to move quite freely, so any corrosion, notches, or dirt will stop this happening. Grooves in the pad pins are the worst. I
2. Retaining/pressure clips that hold the pads in place. Are they installed correctly, do they allow the pad to move around a bit without rattling. Can be a bastard to make them work properly on some bikes.
3. You said the calipers were overhauled, did this include remove the pistons and seals and scraping out corrosion from behind the seals? Needs doing every few years. The corrosion stops the brake pistons from moving in and out smoothly.

All of the above problems will give you wooden feeling brakes with a delayed response.

[Riejufixing]

You quite sure it's not air?

[talkToTheHat]

Was using EBC HH pads before, new set of EBC HH pads went in.

The lever feel is pretty good. Actually it's the best it's ever been. Reasonably sure it's not air in the system, that feels different.

Are the OEM disks on a (K2) Bandit stainless or otherwise?

I'm wondering if it's to do with the surface roughness of the old disks, which were quite rough providing a little more initial bite than the new disks.

It's a subtle effect, it just feels a bit different and I'm wondering why. I don't think it's anything wrong. I've never ridden a bike with brand new brakes, everything has had a few thousand miles and a few years on it by the time I've tried it.
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Bandit. does. everything.

[jaffa90]

""""Rather than feeling the bite instantly, it seems to build in the first fraction of a second after applying brakes,"""


Nowt wrong with that!

[Hong Kong Phooey]

If you've not tried it already, clamp the brake lever to the bar overnight with string wrapped round a few times. In the morning if the lever is comparatively rock hard then you had some air still trapped.

Unless you're describing piston knock back due to warped disks/carriers. Measured the run out yet?

I'd also try a few high speed stops to heat and deposit some more material on the fresh disks just to see if it made any difference.
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'81 CG125, '97 FZS600 : '99 CBR600F4, '09 KTM RC8

[talkToTheHat]

[chickenstrip]