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Front brake squeal

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Waggles:
Yeah I know, they all do that! but mine is causing the local cat population to stampede and shattering windows within a 5 mile radius.

I have el cheapo brake pads fitted ( dunno make - threw package away but I got them from Wemoto ) and coated the backs with brake copper grease

Anyone had any success in improving this? different pads? shims? cutting grooves? don't use the grease?

I know roughening the pad surface stops it, but only for a little while, and at this rate I will be replacing pads rather more regularly than I had anticipated!

Green1:
Hi Waggles

I two have cheap brake pads fitted from DS made in Taiwan ::).They look crap but work well once bedded in.But it still shocks me every time I use the Triumph afterwards I nearly face planted myself into a roundabout.But on the plus side they don't make any noise at all.I didn't put grease on mine but that was because I forgot in my rush to put it together again.

Mick

K2-K6:
The squeal on both bikes and cars seems to be related to pad material, although I've never seen a sure way of stopping it for many years.....sometimes it seems different methods as you describe can affect it but nobody seems certain.

Effectively you've got the pads to chatter on the disc surface, which sets the rasonance going through the disc (this is how I've had it explained to me) if you can prevent that surface interaction then the disc itself won't magnify it.

Make sure that you do have the right clearance to the disc if it's on the adjustable swing type calipers.

You could try this; rough the pads as you've previously done.....then when installed, run it around with the brake dragging to get it really hot......when it is, don't stop the bike while its' that hot but drive normally to let it cool......this is an old method of bedding in friction material and conditioning the surface of the pads original formed to get any of the unstable resins used in manufacture to burn out of the pad structure and can be surprisingly effective......assuming that was the cause.

It usually gives you a better initial "bite" and more linear response as well if it has any affect....not quite what the Triumph has though ;)

Waggles:
OK, thanks guys.

Am inclined to think its the material so will replace with a different type and see how we go. Adjustment of brake is OK so it can only be material or bedding in. I usually bed mine in carefully and don't use them hard until the sponginess has gone as I heard that hard use might 'Glaze' the pads surface and cause squeals but despite that mine still does it so who knows!

Haven't ridden a modern bike but I can imagine the difference!

Bryanj:
have you got the nylon washer that goes between the piston and pad, it can make a difference but not always

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