Front brake squeal elimination?

Okay, I've cleaned the master cylinder---including the little pressure relief hole---bled the brakes twice, put new pads in (factory Yamaha), greased the dog snot out of the caliper pivot pin and bolt (inside and out, with lithium-based moly grease and graphite powder), torqued it too 226.7 in-pounds, applied loctite to the cleaned, exposed threads of the pivot bolt and nut, used Permatex disc-brake-quiet spray on the backsides of the pads and both anti-rattle clips, blasted the pads with non-chlorinated CRC brake cleaner, roughed the pads with 80 grit then 100 grit, and chamfered/beveled every pad edge to as close to a 45-degree angle as possible.

And still, upon first application of the front brake lever.....a light touch.....there's still an annoying squeeeeeeeaaalll (anything more than a light touch and there's no squeal or it goes away).

Rotor looks fine, not scored or grooved. And the squeal is not an on-and-off type of noise, it's constant (it's a squeal, not a squeek), not like it's due to a warped rotor.

Any ideas? I have not rebuilt the caliper, bike only has 11K miles on it, and the brake works just fine.

 

I tink i mentioned this somewhere else .SHOOT THE MOUSE.

 

I'm going to take a page from HooNz, install a stereo. From your description, your system is working just fine. A slight squeal at light pressure isn't cause for worry in my book (in particular if the pads are new). Did you by chance break the glaze on the rotors? Run a sanding disk of about 120 grit all the way around the rotors, leaving a nice whorling pattern around the whole of the pad contact area. Let us know what happens.

 

chacal, if you have the rectangular pads with a screw at the top you are probably missing the anti-squeal shims. If you have the tapered pads that mount with one bolt they don't use shims.