Had my first service today. When I got home and started 'er up I drove it off the truck and put it in neutral and to my surprise I heard a horrible sound from the trans like a "vvvrrrrrrrrrrr". It was like something was spinning very fast and after about 7 seconds it got less and less and stopped. I turned it off for a few minutes and turned the key, The friggin bike started just from turning the key to "ON" position(IT WAS IN NEUTRAL). I took it on a 3 mile ride and that vrrrr sound would keep happening when i would put it in neutral. Eventurally it started doing it less and less and now its completley gone. That only happened in neutral. It was like it was slipping or something and then fixed it self. The bike ran and runs great, and the sound is now completely gone. What caused that to happen?? SORRY FOR THE LONG POST AND THANKS ANY HELP