SOHC.co.uk Forums > CB350/400

Front brake squealing

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Mikep328:
Agree. After refurbishing my front brake system NONE of the five different pads I tried/bedded-in squealed.  So it seems very arbitrary... ;)

taysidedragon:
Any squealing noise must come from a vibration,  either from the pads or part of the caliper/pivot arm assembly. Bevelling the edge of the pads cures the squeal in some cases, but not all so that could point to the noise coming from somewhere other than the pads.
The nylon disc on the back of one pad was put there to reduce squeal, I assume, so it looks like Honda deduced that it came from that source.
My brake squeals so I'm going to change to EBC Organic pads and see if that makes any difference.

exvalvesetdabbler:
Same here, never had any issues with old asbestos pads, I was tempted to put them back in but there's not much meat left on them.  I currently have EBC pads fitted around 2005 ish ,   I think it must be something to do with the combination of resin binders in the pads and the stainless steel disc that makes the issue more likely.

The only alternative is pads that are more abrasive but the you have increased disc wear.

Back in the day, I remember having to give the caliper the heel of my boot at traffic lights on a few occasions  because it was dragging but there was never any squeal.

Regards
Dave

TrickyMicky:
I can only relate to my own bike, and unfortunately I cannot remember the brand of pads I fitted. They squeal like stuffed pigs when cold, and just 'feathering' the brake, especially when pushing it out of the garage first thing.  The whole brake system (except the disc)  was renewed 6 years ago and the squealing started about a year after that. I'v dismantled it a couple of times to change pads, clean and coppaslip the pivot pin, wet & dry the disc and pads, which is effective for a couple of months or so. The noise is loudest, as said, when cold and only braking very lightly. Fairly firm braking on a warm disc is virtually silent. Do not recollect hearing about this problem on many other vehicles, but, I am wondering, are these CB 4 cylinder models the only vehicles to be equipped with a stainless disc, and didn't give a problem until the end of asbestos?   Just as an aside, back in the early 90's,  I used to drive a Volvo coach which had drum brakes, remember them?, and when it was first fitted with asbestos free linings they were quiet until they reached running temperature, then the noise became horrendous, I could alter the note by changing the pedal pressure!  Can't remember the outcome as I changed companies.

Mikep328:
Excluding pads, are the "squealers" using "HONDA"  brake parts, aftermarket brake parts, or a combination?  Just wondering - an OEM piston, for example, may have a different "vibration period" compared to an aftermarket piston.

What about brake lines?  Could a more "expandable" brake line allow pulsing/ vibration compared to a stiffer brake line as the pads move across any unevenness in the rotor surface.?

OR...could uneven torque of the rotor attachment fittings contribute?

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