Brake squeal

[79XS11F]

I can't find much on brake squeal in the tech tips, repairs and or maintenance sections . I had rebuilt my brake system in the spring and recently put new after market pucks on the front end hoping to end brake squeal. Didn't help. the front brakes are still VERY noisy as in squeaking when the brakes are applied. any know cure for this. i already cleaned the disc's and lubed the sliding surfaces between the pucks and the guides.
Rob

[DiverRay]

Try pulling the pucks, and LIGHTLY sanding them on a FLAT surface. You may have put the brakes on too much BEFORE they had a chance to break in.
Ray

[icecycle]

Brake squeal

STILL have the same problem.
PO had already given a good try at stopping the squeal by lightly gluing the pads to the casting and the plunger. To stop vibration; hence stop one cause of squeal. It didn't work. So far I've removed the glue, lightly sanded the pads using 80 grit then 100 grit emery cloth. Note put a full sheet of paper on a very flat surface (table saw) and moved the pad in the same arch as the wear marks. Also took a file and slightly bevelled all edges including the wear indicating groove. Lightly cleaned the pads with a soft cloth then decided to use compressed air. Used brake cleaner to clean only the rotors. Failed; still squeaks.
Plan B Re do. More sanding and increase the amount of bevel. Reasons, 1. Still may be glaze on the pads. 2. Increase the amount of edge bevel, about a mil in each direction. Looked at the pads in my other XJ 1100 1/2 worn; edges are really chipped but she don't squeal.
The PO says he used pads from the dealer. So plan C will be toss out the pads unless someone has a better idea.

[icecycle]

Still squeaking

Forgot to mention. When I did the disc brakes on my 750 maxim used after market pads. Road in second gear gently seating the pads, not letting them heat up. No sqeal with this bike

[petejw]

a thing we used to do that sometimes works
is real heavy braking, take the bike up to speed
in a safe area and apply the brake thats squealling really hard, its the same
process as bedding the pads in, do this a few times to get
the brakes really hot.

[petejw]

the idea of bedding in brakes is to take the high spots
of the pad and for the pad to mate with the disc, the best way
to acheive this is hard heavy braking. instructions are usually
on the packet. light braking causes glazing to the disc and pads.

[icecycle]

Thanks Pete

What you say is logical. Thinking 2nd gear 50km so they have to work hard. Limiting the time used so the pucks don't heat and glase.
Thanks
Bruce

[icecycle]

Bad pucks

done every thing I could think of:
Made shims, cleaned and lubed holding springs, contact points, bolts, piston, bevelled the edges, then increased the size of the bevel, sanded the faces more than once. Used anti squeal. Checked and added a drop of fluid to the master. Still sounded like a stopping bus. So took one set from my other 1100 and persto no noise in the set.
Good feeling finding out its the pucks. Bad feeling that this is the first time original Yammy parts suck. Both fronts and the back squealled. Sort of unbelievable, that I'd have 3 bad sets. Now to decide what type and brand to use. In the mean time I'm switching over the other pads. PLUS just for laughts going to put the Yammy pads into the other bike and test.

[b.walker5]

I've only ever used these http://catalog.vesrah.co.jp/catalog/shape/SD-215.html and have never had any problems. Sometimes a new set will squeal the first couple of times but not a sound after that. They stop well and seem to last okay. I did have a rattling problem for a long time but it wasnt the pads.

[planedick]

Squeel

There is supposed to be a special sheet metal spacer between the pad and the piston to prevent squeel, but they are no longer available from Yamaha. I have been thinking of manufacturing some. Maybe if I could get enough interest here I might just do that.

[cywelchjr]

I use the same anti-squeal stuff that I use on my cage and it seems to work pretty well. It's in a squeeze bottle and is kind of a silicone like stuff that dries rubbery hard. It's bright orange though so I try to make sure I don't get it all over the place. I put it on BOTH pads, as it's supposed to keep the pads from vibrating in the caliper when stopping.

[CatatonicBug]

There is supposed to be a special sheet metal spacer between the pad and the piston to prevent squeel, but they are no longer available from Yamaha. I have been thinking of manufacturing some. Maybe if I could get enough interest here I might just do that.

Those shims make all the difference. I had lost the one on my right front caliper, and it had an annoying squeak at low-speed stops. I managed to find and install the shim yesterday. It's perfectly quiet now!

[Olsen_XS]

If you look at new brake pads for cars they sometimes come with a rubber like coating on the back side to prevent squeeling. I have seen this stuff sold in separate mats/fabrics to be cut to match the specific pad.

Worth a try at the automotive accessories store?

[petejw]

the anti squeal shim usually comes with
the new pads, if not you can cut up a soft drink
can and cut to shape,
heres a pic of 1.





the anti squeal stuff cy mentions ive used on autos and can also work well.