Strange noise from avid juicy 3

J55TTC

My avid juicy 3 brakes fitted as standard to my 2 week old rockhopper comp are making some strange noises :oops:

Doesnt happen on the rear only the front and the noise is very difficult to describe. Its almost as though they are biting harder at a certain point on the disk which makes a kind of fast "peuw, peuw, peuw" noise under hard braking until you stop. If you brake lightly they are fine - no strange noises. I think it could possibly be linked to movement in the front forks, but I could be completely wrong :?:

The bikes only done about 50 or 60 miles around swinley forest and other local woodland areas and I reckon the fronts are only just bed in properly. I noticed it after going through a puddle that caught me by surprise but Ive given the bike a proper clean since, thinking it might just be dirt but to no avail

I know I have definitely not contaminated the brakes with anything else but dirt or water.

Any suggestions?

nicklouse

i bet it will match the disc pattern.

discs do make odd noises.

J55TTC

You could well be right.

Braking performance doesnt seem to be effected.

Its the first bike Ive had with disks so could well be something normal :?

I might need to pull the pads out and clean them and the disk and see what happens.

.blitz

If you take the pads out, a smear of silicon compound or Copaslip on the back of the pads works wonders.

J55TTC

Thanks .blitz

krav

Both my brother's 6 week stumpy and 1 yr rock hopper both have avid and both make a turkey gobble sound, strange i know. We call them the turkey gobble brakes for obvious reasons.

nicklouse

and the turkey gobble noise id the pads going over the holes in the rotors.

as the pads have holes in the backing plates grease of any kind is not a good idea as it get drawn into the friction material.

J55TTC

"Turkey gobble" yup that describes it much better!

Something Ill have to live with I think.

Are there some better disks worth upgrading to?

krav

There's no point updrading as it never affected the performance but my bro did changed to 203's all round just because he likes excess not because of the turkey.

.blitz

nicklouse wrote:

as the pads have holes in the backing plates grease of any kind is not a good idea as it get drawn into the friction material.

Copaslip is an anti-seize compound that has an operating range of up to 2000 degrees F, and silicon compound is used to improve the thermal transfer on heat sinks. Neither of them will melt or migrate in any way when used on the back of disc pads.

nicklouse

.blitz wrote:

nicklouse wrote:

as the pads have holes in the backing plates grease of any kind is not a good idea as it get drawn into the friction material.

Copaslip is an anti-seize compound that has an operating range of up to 2000 degrees F, and silicon compound is used to improve the thermal transfer on heat sinks. Neither of them will melt or migrate in any way when used on the back of disc pads.

and the problems I have seen on bikes where people have used coppa slip on their pads....

I use coppa slip on car pads/shoes with no problems but bikes...

Please note i did not mention anything about the silicon as I dont use it or have seen anyone use it.