I was out riding today and with earplug in listening to music I heard what sounded like metal dragging under the bike so I stop and look...nothing there...take off again minus earplugs....once I get going the noise continues...Kind of a metal dragging. so I baby it into the nearest town (50 miles from home). By the time I get there it sound like there is a gear randomly grinding... The motor runs fine and trans shifts with no problems...Could this be a bearing on the belt drive or clutch ? any Ideas ? Or offers to buy as is ? love this bike..but not motivated to work on it right now...