At the end of last season I parked my C90 in the driveway, left it running, and went back inside. I came out a few minutes later just as it rolled off the kickstand and onto it's side. I picked the bike up right away and inspected it for damage. A few minor scrapes and a broken turn signal. The problem is now that the handlebar rattles, not shakes, but rattles. Clearly whatever is inside the handlebars has been knocked loose and makes noise. I would like to understand what it is inside I screwed up and how to fix it.