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Brother in Law has a 02 600 XCSP.  Is anybody else experiencing excessive noise from the brake at all speeds, but most noticable on throttle let off (No Brake).  Finding topend speed of 90-95 mph.  Idea's?
 

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Make sure the brake caliper is not binding and it fully realesing from the motor,also check to make sure that the chain ia adjusted properly(finger tight and back it off 1/2 turn) Polaris is known to have a noisy brake system this is caused from the single piston caliper. as far as the top speed make sure the track isnot too tight as they were to tight from the factory you can run it with about 1 to 1/2 in of free sag just run it tight enough that it don't rachet on the drive sprockets also soften up the spring tention all the way around so it sags with the rider on it this will also help you pick up some top end it should bottom out ocasionaly if not he is not using all of the suspension travel if it bottoms too much turn the springs up a little till it quits.also check to make sure that it is not overreving to much it will start to lose power after 8300 rpm if it is go to the next heavier clutch weights also a good compound radius helix helps with exceleration try a 38x or a 36x from hot seat and a silver secondary in the no2 hole from hot seat.
 

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I too have a 2002 600 XC SP.  It makes a little bit of brake noise when I let off the throttle.  It makes a high pitch whine when the brake is applied.  Your top end speed is way to low for this machine you should be up in the 110-115 mph top end speed I can do 95 mph just above 3/4 throttle.  How is the idle on your machine, mine stays up at 4000 then drops to 2400 rpm after about 30 seconds.  But if I shut it down and restart it, it will idle at 1500 rpm wondering if I have a vacuum leak.
 

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This is normal so don't be alarmed.I beleive it has something to do with burning off the excess fuel in the pipe after a hard run.
 

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I have a 2001 X 600, and I just had it on the lake this weekend, with my girlfriend on the back, and got 105mph.  And I have one tooth smaller gear in the chaincase, so my stock topend should be higher.... and higher yet if I ditch the girlfriend!
I dont notice any brake noise, though.  The only time I hear any noise from the brakes is when I am squeezing on them.

Also, doboy, my sled has the same idle characteristics.  I'm not too worried about it, I have heard the same thing from alot of other 600X riders.
 

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Brake noise varies between sleds.  Last year we had 2 600 edge X's and 1 had no brake noise the other was so bad my son traded it with 1000 miles on it.  He hated it, this year he has same sled and it has no brake noise at all.  The idle thing is partly jetting and partly cd set up.  They will idle fast and then drop down but the 02's don't seem to be so noticeable.
 
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