Trying to figure out what the thing is under the bike just behind the engine/trans pan. It looks like a narrow box wrapped in tough tin foil attached crossways--its length is about the width of the bike down there, and maybe 3" wide. It seems to be real light, and attached on one side, so the other side can move up and down about a half inch against the bottom of the bike. Once in a while I hear something bump or maybe rattle under the bike when I hit a bump. Last month I went over a speed bump in a McDonalds lot in Colorado very slowly, but the asphalt bump was extra high and the bike came down hard on it. Was riding 2 up, and loaded. Checking it out at the time it seemed that the hinge points on the center stand took the bump, but I wonder if this thing I described got knocked loose. Don't have any idea what it is or what its purpose is. Any ideas out there in Wing Land? Its a 2008 GL1800. Thanks in advance.