Report "Vibration Problem My Multi has a high frquency vibration across the rev range. It is most noticable in the seat and if you touch your knees to the tank. It is bad enough that 3 bolts vibrated out of the muffler cover. Has anyone had a similar problem? I think it may be worn main bearings. Bike has only 8 thou on the odometer, and serviced at correct intervals. Started this about 2000 miles ago, not getting any worse. Bike runs fine, idles fine. Any ideas?"