Weird noise from the back

[plexiform]

Anyone know what this noise is? Seems to be getting worse. Has been present for some time now. Bike feels fine while running.

 

https://m.youtube.com/watch?feature=em-upload_owner&v=XpToBiy6e_4

[docc]

First thing, you can remove the forward facing plastic cap over the brake pads and use a brake parts cleaner to clean that area out.

 

Better yet, remove the caliper, remove the pads and inspect their thickness and wear. Using brake parts cleaner, chock one piston and work the other in and out, cleaning with the spray. Repeat with the other piston. Clean, polish, and lubricate (silicone grease) the pad guide pin. Bleed the fluid with the nipple facing upward.

[docc]

It's also worth pulling the wheel and feeling that the wheel bearings and rear drive bearings turn smoothly.

 

Third thing: shaft lubrification.

[coreytrevor]

I agree with the brake making the noise. Easiest way to check, take out 2 caliper bolts, remove caliper, see if noise goes away.

 

I don't think bearings or anything internal would sound like that.

[Chuck]

Yep rear brake. My Centauro freaked me out the first time it did it. 

[plexiform]

Thanks for the input.  Will service the brakes and report back.  

[Cabernet]

Concur, it is the rear brake groaning.

 

Sent from my D5803 using Tapatalk

[Lucky Phil]

Rear brake pads.

 

Ciao

[coreytrevor]

Was it the brake?

[plexiform]

Sound is gone.  Bled the rear brake and changed the pads and cleaned the caliper and rotor.  Used 5.1 fluid for replacement.  Pads are now EBC.

[Chuck]

It'll come back.