Had the same problem. It is probably the oil seal for the clutch that has become un-seated. You will have to remove the foot pad, shifter, and chrome cover. Just slightly to the right and above the kickstand, you should see a circular chrome cover a little larger that a silver dollar. Remove it and you should find a small rod and a hard plastic oil seal. You can re-set the seal usuing a small deep well socket. I would strongly recommend replacing the seal, but by re-seating the old one should temporally stop the leak.