Just thought i would give a FYI thread that might help somebody out in the future. I have a 09 star 950T with around 26,000 miles on it and around august of last year, i noticed a squeal that sounded to be originating from the rear tire, so i figured rear axel bearings. After i pulled the rear tire off and inspected everything, i couldnt really find anything wrong that would lead me to be the culprit. The bike still being under an extended warrenty, i put it all back together and took it to the dealer. After keeping it for a week, way to long, they called me and told me that the technician drove it but couldnt hear the squeal and they didnt want to tear into it with fear of not finding anything and warrenty not covering it, but did find that my belt was too tight and made proper adjustments. After getting it back, it seemed that fixing belt tension really helped for about a week or so, but then it came back. After a bad winter and not riding it much, i finally got it back out and on the highway and it progressively got worse with the squeal now sounding like it was coming from the front drive sprocket. I took it back in a couple of weeks ago and got a call to come talk to them. The service manager said they took it down the highway and could definitely hear it now. They put it on the lift and let it idel in gear and could see the front sprocket had a wobble to it. After tearing into it, they found that my primary gear was warped. They said the bad news is it is about $1100 in parts and the extended warrenty doesnt cover sprockets or belts, which it needed among other things, but the good news is they talked with yamaha and yamaha said they would cover all the parts, i would just have to cover labor. It worked out in the end i guess. Just thought i would share in case somebody else has the same problem in the future.