My bike has 29000 miles and recently developed a vibration that intensifies with increased rpms. It does it in neutral stationary and in motion while driving. I start to notice it around 2300 rpms and it gets real bad around 3000 and up. The local dealer basically says he will bill me a fortune taking the bike apart to find it. Aside from the vibration the bike seems to run fine and no check engine light. Any ideas? Thanks!