Ducati Monster Forum

Moto Board => Tech => Topic started by: Duc796canada on September 26, 2010, 02:16:43 PM

Title: Noisy rear brakes
Post by: Duc796canada on September 26, 2010, 02:16:43 PM
I have searched for a fix, how do you fix the noisy rear brakes on the Monsters!?
Title: Re: Noisy rear brakes
Post by: The Bearded Duc on September 26, 2010, 02:39:08 PM
What do you mean noisy?

Can't be worn on a new 796. Is everything tightened down properly? Check the mounting bolts and brake pad pins.
If anything take it back to the dealer. The bike is still under warranty right?
Title: Re: Noisy rear brakes
Post by: GBusa on September 26, 2010, 03:25:06 PM
Mine's a bit noisy on light aplications out back as well.
Thought perhaps I didn't get the rears bedded in properly and might have glazed them or that perhaps the rotors weren't cleaned and the pads got contaminated. 
Guess it may just be the nature of the stock rear pads?
Tis slightly anoying in slow stop and go, or at parking lot speeds.
Title: Re: Noisy rear brakes
Post by: Scotzman on September 26, 2010, 03:29:53 PM
I just read somewhere (desmo times?) that you can cut a piece of aluminum can and put in between your brake and caliper to absorb vibration. Does it work ???
Title: Re: Noisy rear brakes
Post by: Veloce-Fino on September 26, 2010, 03:31:48 PM
Quote from: Scotzman on September 26, 2010, 03:29:53 PM
I just read somewhere (desmo times?) that you can cut a piece of aluminum can and put in between your brake and caliper to absorb vibration. Does it work ???

That just sounds sketchy.

Do you mean squeaking/squealing, rattling, clunking... what type of noise.
Title: Re: Noisy rear brakes
Post by: Artful on September 26, 2010, 03:42:05 PM
Quote from: Scotzman on September 26, 2010, 03:29:53 PM
I just read somewhere (desmo times?) that you can cut a piece of aluminum can and put in between your brake and caliper to absorb vibration. Does it work ???

Do it yourself shim, makes sense. Just cut it to the shape of the pad, then cut tabs and fold them around the edge of the pad backer so they don't shift around. Most auto manufacturers use shims on their pads to reduce noise, no reason it wouldn't at least help. Little dab of red stop squeak wouldn't hurt either.
Title: Re: Noisy rear brakes
Post by: Duc796canada on September 26, 2010, 03:46:15 PM
Yes, noisy as in during applications they squeal! No, they aren't worn, the bike is brand new!
Title: Re: Noisy rear brakes
Post by: Scotzman on September 26, 2010, 05:39:54 PM
Quote from: Veloce-Fino on September 26, 2010, 03:31:48 PM
That just sounds sketchy.

Do you mean squeaking/squealing, rattling, clunking... what type of noise.
I said the samething, then I said, "Wow, that's redneck", no offense to anyone.
Title: Re: Noisy rear brakes
Post by: alibaba on September 26, 2010, 06:33:37 PM
Had same issue on '69 696.  Replaced new pads with Ferodo Platinum Series #FDB2074P.  Noise almost disappeared - much better -  and much improved braking.   
Title: Re: Noisy rear brakes
Post by: Nomad on September 26, 2010, 10:01:55 PM
Quote from: Scotzman on September 26, 2010, 03:29:53 PM
I just read somewhere (desmo times?) that you can cut a piece of aluminum can and put in between your brake and caliper to absorb vibration. Does it work ???

Works like a charm.  Mine used to sound like a garbage truck slowing down.  Cut two peices out of an aluminum can just slightly smaller than the pad, drop them in behind the pads and it will greatly reduce your braking noise.  If there is still noise, put a little grease on the brake pad retaining pin and if you've still got noise... who knows.  I did those two things and have absolutely zero noise while braking now.
Title: Re: Noisy rear brakes
Post by: Duc796canada on September 28, 2010, 08:56:37 PM
Quote from: alibaba on September 26, 2010, 06:33:37 PM
Had same issue on '69 696.  Replaced new pads with Ferodo Platinum Series #FDB2074P.  Noise almost disappeared - much better -  and much improved braking.   


Thank you!
Title: Re: Noisy rear brakes
Post by: Duc796canada on September 28, 2010, 08:58:58 PM
Quote from: xarlo on September 26, 2010, 10:01:55 PM
Works like a charm.  Mine used to sound like a garbage truck slowing down.  Cut two peices out of an aluminum can just slightly smaller than the pad, drop them in behind the pads and it will greatly reduce your braking noise.  If there is still noise, put a little grease on the brake pad retaining pin and if you've still got noise... who knows.  I did those two things and have absolutely zero noise while braking now.

I will try that too! I know some sheet metal guys, they might actually make it look less "ghetto!"
Title: Re: Noisy rear brakes
Post by: Howie on September 29, 2010, 03:04:04 AM
Before shimming sand the pads, put a slight bevel on the top, bottom and leading edge and clean the rotor surface with brake cleaner, acetone or alcohol and an abrasive pad.  Go out and bed the brakes.

Lots of theories exist on bedding in brakes.  Here is one  http://www.braketech.com/index.php?option=com_content&view=article&id=54:racing-brake-pad--bed-in-procedures&catid=17:tech-talk&Itemid=69 (http://www.braketech.com/index.php?option=com_content&view=article&id=54:racing-brake-pad--bed-in-procedures&catid=17:tech-talk&Itemid=69)

The idea is to seat them without overheating.  Living in NYC I never really get to follow anyone's procedure.  Light braking can cause overheating also before the brakes are bedded.

Actually, if you want, you can make and install shims at the same time.  Teflon sheet will work too.  So will these products, though they leave a lot to be desired aesthetically  http://www.google.com/products?hl=&q=brake+quiet&rlz=1B3GGGL_enUS314US314&um=1&ie=UTF-8&ei=WSmjTJGaJ8H_lgeOhKGfBA&sa=X&oi=product_result_group&ct=title&resnum=3&ved=0CDoQrQQwAg (http://www.google.com/products?hl=&q=brake+quiet&rlz=1B3GGGL_enUS314US314&um=1&ie=UTF-8&ei=WSmjTJGaJ8H_lgeOhKGfBA&sa=X&oi=product_result_group&ct=title&resnum=3&ved=0CDoQrQQwAg)

The reason I said deglaze and bed first is glazed pads don't stop well.  Shimming alters vibration (the squeal you hear) hopefully changing it to a frequency you don't hear.
Title: Re: Noisy rear brakes
Post by: mtuduc on September 30, 2010, 06:04:48 PM
I was having all kinds of problems with very noisy brakes. I found my solution in the superbike pits. I witnessed a couple teams cleaning the calipers in a bucket of soapy water with an assortment of brushes. Once I was back in the garage with my bike, I took the calipers off and did the same and then blew them off with the air gun. The noise was gone after that.
Title: Re: Noisy rear brakes
Post by: Duc796canada on October 24, 2010, 09:50:02 AM
Update: went in for my 600mi/1000km checkup, got my gearing changed and all the wonderful things they on the 1000km service. When I rode out of there, no rear brake squeal, so far good!!