My 99 SP500 rear brakes have a squeak that irratates me to no end. I pulled the pads which were not worn then I scuffed then with sand paper. It worked fine for a day. The noise is anytime the brakes are not applied. And is not continuous. It seams to occur at the same point on the rotor. The rotor appears to be true. I didn't want to replace the pads to find the new ones sound the same.
Does anyone have any other suggestions.

Thanks

The disk may have a slite warp ,Polaris has harder heat treated disks on there 2000 and 2001.
My rear disk warped and a mechanic told me it was common on my bike but he put a disk on and left a slite side to side play on the new disk.He told me it make the disk free floating and this causes it not to warp and he did it to his own bike.If I have to change the disk ever again I would see if the new heat treated disk will fit on my machine.

My 99 Sportsman 500 has had the same squeak in the rear brake from the day I picked it up. It only hits in one spot on the rotor and is really annoying at low speeds. The dealer refused to fix it and told me they all do that just spray brake cleaner on it. Ya, like that is going to fix anything! I figure when I replace the pads I'll fix it then.

Most auto parts stores carry brake grease. I don't know what the proper term for it is, but that is what I call it. It is a sticky substance that you put on the BACK of the brake pads to dampen vibration and quiet the squeak. Sometimes it works, sometimes not, but it always seems to help at least somewhat.

you can also use silicone to keep the pads held back

Ecorman just e-mailed me and suggested that the stuff I was referring to was liquid rubber. Could be, it is a black sticky substance. I think calling it brake grease may be confusing, but whenever I ask for the sticky stuff to put behind brake pads, the person behind the counter knew what I was talking about. Thanks for being so cinsiderate, Ecorman, but don't ever worry about correcting me. I freely will admit when I am wrong to everyone except maybe my wife :)

PS I dug around in my shop and found 2 tubes of stuff I was using for squeaky brakes. One is labeled 'liquid rubber' and the other is 'silicone brake grease' and is labeled for corrosion protection/lubrication of the caliper bolts and for use on the back of the pads to dampen vibration. Maybe I have been using both? That could explain why sometimes it works better than others. Now if only I could be sure which one I used where...
Hope I didn't confuse anyone

My 335 also did that. When the pads wore out, I had my rotor turned(tool&die shop at work) and put a set of Moose Sintered metal pads on.