It would probably be a good idea anyway to get a 10mm and 12mm socket, or just a metric socket set. Chances are you'll need one or the other in the future, since 10 and 12mm are the most common size on small fasteners. Shoot, I can get away with doing a majority of the work on my Toyota with a 10, 12, 14, and 17mm socket.
As a side note, do you have the tool kit that came with the scooter? I found one on the underside of my seat. I didn't pull everything out but it looked like there were a few wrenches in there...