All 2st Rear rotor rattle

Does anyone else experience this with floating rear rotor? My 09 300 rear brake rotor is an audible rattle when my bike is running. Is there something that I should be checking for to see if its loose or broken? The bolts are all snug. If I start it up and grab the rotor, the loud rattle goes away. When i let it go...it rattles like hell.
Is this normal for this bike? I don't remember it being like that when new.

Should be normal, mine does it a little.

Yep, normal they all do it. It's to warn Squirrels, Chipmunks and Orange riders your coming.

[quoteas;dlvkj hwer[goifh fjbankes, post: 181516"]Yep, normal they all do it. It's to warn Squirrels, Chipmunks and Orange riders your coming.[/quote]

HA! Nice one. Well then, I guess I just wont worry about it. Those orange riders could use some more help.

My 02 CR 125 and 250 did it and it annoyed the heck out of me, I replaced the rear rotor with a Braking wave rotor that is like what the new TC's come with.

Mine did it on a 09 WR 250. Check the Allen screws frequently cause I had one back out and hit the brake caliper. Luckily I found it while unloading the bike and not at speed.