Sqeaky rear brake

[exhalent99]

OK nearing 2000 miles on my Like since the first week of May.  Not bad huh?

The bike has been nothing but great to me (and my wife) and has only improved since I drove it off the lot of the dealership.  The only exception was the rear left shock suddenly coming apart but graciously left me with all the hardware intact to fix it.

Since about just before that happened I noticed a squeak from the rear wheel as though the brake was rubbing the disc, but only at a tiny portion of the rotation.  This happens regardless if the bike is on or not, I first noticed it when wheeling it out of my yard turned off.  I though at first it was a little moisture on the pad and that it would clear up as soon as it dried.  Well it has not gone away....

When on the center (centre for us Canuks) stand and turned on, I still get the slow rotation of the rear wheel, it catches at that one point during rotation but keeps going.  I can't tell if maybe the brake is slightly stuck (engaged) or if maybe the disc is loose at one of the fittings.  I checked my brake fluid level and it is showing full on both sides.

I am about to head into the yard to do a wash and examine the area again.  Any ideas are appreciated.  I doubt routine break maintenance is covered by warranty so I have no desire to bring it in.

[Stig / Major Tom]

Did the disc possibly get tweaked (bent) when the shock was coming loose? Not sure how that could happen.
Can you check the run-out of the disc by holding a tool or pencil against a fixed point (the exhaust ?)  while turning the rear wheel. You should see something if the disc is no longer dead flat, or, or the wheel assembly is no longer aligned ....no, that wouldn't happen I don't think as the whole brake assembly and wheel are one item on an axle.
When I've had a brake chirp with disc brakes it was cured by placing a silencer (shim or lube) behind the brake pad to quell that tiny harmonic vibration (= noise) within the caliper set off by pad/disc contact. The pads are supposed to remove themselves from contact with the disc when brake lever is released - if it's not the pad can vibrate & you can get a sqeak.
But, it sounds like your disc and pad are making contact at  a specific place - ? Disc warped? Bent? (maybe all of ours are slightly untrue . at this point)
A little sand-papering of the pad to remove a glaze ? Slip it in there and rub it about on the pad.
And I would check the disc run-out  first.

[MotoRandy123]

My guess would be a bit of build up on the rotor.
You could try cleaning the disk with a scotchbrite pad or
make a few high speed stops to heat it up and smooth it out.

[exhalent99]

Thanks Stig and MotoRandy, I will check the runout first, then give it a good wipedown as it does look dirty.

A few high sped stops also crossed my mind, I'll let you know how/if I solve it.

[TroutBum]

It could be a bearing. I had a similar instance on a motorcycle I had. Turned out one of the bearings had a flat spot. If it is still under warranty I'd take it back to the dealer for inspection and repair.