GTS OWNERS CLUB

aa-gts · Posted: Mon Jul 21, 2008 11:46 am Post subject: Front disc replacement

Right guys, time to call in your experteeeesss....

At my last service (three weeks ago) I had to have the (three year old) front disc replaced due to it having a number of hairline fractures in it.

The damaged disc was replaced with an EBF(?) one and I was given the obligatory advice re letting the new disc bed in.

Well, three weeks later and the front brake is still a bit squishy and where I used to hammer on the front brake alone to stop me, now I've not got a lot of confidence in using the front brake alone.

Surely after three weeks the disc should be working properly, or am I missing something?

fleecemeister · Inspector Joined: 26 Jul 2007 Posts: 226 Location: CANNOCK

i'm no expert, but is that maybe why your front disc was shot? Surely hammering on your front brake alone is putting adverse pressure on the disc and the front shocker? But like i say.. no expert?

Blackpool Paul · Posted: Mon Jul 21, 2008 8:36 pm Post subject:

Ive always used the front more than the back, about 75%front, 25%rear, avoids the back end skidding, and transfers weight to the front of the bike, but I would have thought the brakes on your bike would have bedded in after about 100 miles easy, perhaps it needs bleeding if it feels spongy?
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GTS250 its the future!!! A club wi owt a name sc. Bamberbridge.

aa-gts · Posted: Mon Jul 21, 2008 8:52 pm Post subject:

That's what I thought, but they didn't change the pads and didn't touch the caliper (other than taking it off to remove the disc) so not sure why it would need bleeding?
I'll give it a go, though, and see what happens.

I was wondering if a new disc would have a protecting coating on it that needs to be worn off through use?

Blackpool Paul · Posted: Mon Jul 21, 2008 9:04 pm Post subject:

I would have given the new disc a good clean with panel wipe, or thinners, to be sure the brake surface was clean and free of any oil, grease etc, could be the pads ARE contaminated with protective oily stuff put on the disc to stop it rusting whilst in storage, for the cost, change the pads and disc at the same time, bed in together then dont they. Rolling Eyes

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GTS250 its the future!!! A club wi owt a name sc. Bamberbridge.

Mr vespa · Joined: 20 Jun 2008 Posts: 15 Location: cambridge

Should have changed the pads as well,the old ones would have worn to match the face of the old disc( if it was scored) and maybe because the new disc is nice and flat the the friction material on the old pads is not making full contact with the new disc.Change them.
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Mr Vespa-cool as ice.

CheekyThomas · Guvernor Joined: 18 May 2007 Posts: 1374

Old pads on a new disc is one of the biggest no no's ever! Even EBC who make your disc say never use old pads so I would certainly complain about it. Did you check genuine disc prices? About £28 now if I remember right.

I would guess the caliper needs a fluid change, was it done last year sometime as per the service schedule?? Just hope the new disc hasn't been warped slightly from the use of old pads.