C90 rearend "whirr"
 

I just purchased (one month ago) a new C90T. I trailered it to Florida and on a short helmetless ride heard for the first time a "whirring" sound in the rear. I thought at first it was the tread on the road but it doesn't change when swerving or at different speeds. I wondered about sticky brake discs but sound does not change with application or rear brake. I pulled the clutch in at speed and the sound stays the same when coasting. Any ideas? Anyone else familiar with the problem. I am here for a week, 700 miles from my dealer and do not want to miss the ride time. Bike rides and performs well==is this just a C90 sound? Any help greatly appreciated

Normal sound

my 05c90t whirs too in the rear. i cant hardly hear it but my wife on back does. also i hear a kind of a thrashing sound from the front of the engine on acceleration since new. took it to the dealer, he rode it and said he couldnt hear it. guess its nothing to worry about since it hasnt got any worse

also one of my chrome studs fell off the backrest, yes i kicked it getting off once and lost it. anyone know where i can get replacements without the whole backrest. the dealer siad thats what i would have to do. have checked hobby shops and other places, can find close but not close enough.