Rotor or caliper?

[RoscoeP]

Ihave only had my DR for a couple of weeks and only put 3-400 km on it. It has a total of about 1800 km on it. A couple of days ago when I was pushing it into the garage I noticed a squeeking sound from the rear wheel. It would start then stop then start on the same area of rotation. The next morning when the bike was cool and I pushed it out it was gone, but was back when I got back from my ride.

I noticed that the rear rotor was darker than the front and it was quite warm compared to the front rotor and I use more front brake. Today I adjusted the rear brake pedal as per the book and went for a ride. When I got back the rotor was pretty warm to the touch.

Any ideas, could it be a sticky caliper? I am going to readjust then go for a ride and not use the rear brake at first(see if it gets warm) then ride using rear brake.

After that I will take the caliper off and have a good look at everything. Anybody run into this before? Cheers?:?

 

[joker650]

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Have u got a dial indicator? Check if the rotor is tweeked.




I just checked on my 99 DR650 and the caliper and pads move slightly free from the disk. The pads are not right up tight to the disk, there is some clearance in there.:ted:

 

[Buck]

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I doubtthat the caliper piston is seized...

Remove the caliper and check the caliper mounting pins for binding. Check that rubber sealing boots are not torn. Lube pins and boots with special brake grease.

 

[Cedartree]

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if everything else checks out you may have a hydraulic issue, although the mileage seems a little low for it.here are some things i would check:

possibly a master cylinder notreleasing all the pressure after you let off the brake pedal, could be caused by a clogged port in the master cylinder, ormaybe the m. cyl piston is not returning fully when pedal released. is there a spring that returns the pedal to the rest position and is it ok?

check your pedal pivots and any associated linkage for binding.

possibly a plugged vent hole in the m/cyl reservoir cap?

if it gets worse and actually causes noticeable drag, you can open the bleeder screw to see if there is residual pressure in the system. if there is no squirt of fluid you can suspect seizing caliper or guide pins

possible seizing piston in caliper. it should squeeze back into its bore easily with aC clamp.

use a good quality silicone grease designed for brake use. regular grease will make your dust boots and any other brake system rubberpartsswell and may melt andcontaminate your pads.

a remote possibility is a faulty brake hose, again not likely with low km, but hoses do get hit and can sustain internal damage, where a small flap of the inside of the hose will act like a check valve and hold a little pressure

good luck and post what you find...

 

[Pee Wee]

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Dr Obvious says, "Take yer foot OFF the brake pedal !!" LOL

I see it on every ride, someone is trying to burn out a taillight. The reason the rotor is darker is cause yer burning it.

If this isn't the case man, have your dealer look at it, before it gets expensive!!