Is the box that holds the dip/main lever to the steering column still securely fixed? It is held to the column by a large bolt/screw reached from under the cowling.
I had this work loose at the dead of night and as a result was unable to get sufficient movement on the arm to get dipped beam. Switching the headlights off resets it to dip automatically and so I ended up in the same situation as you report and unable to get main beam.
A simple job to find the loose screw (!) by feel, and then tighten up with a large screwdriver.
David, August 2007