The START button may have finally melted. This switch provides all lighting power when it is released, and often riders install too much headlight (halgoen, 80w, etc.) and the extra current melts the unpressed contacts, warping the switch. The START side often still works, though.
You can bypass it for now inside the headlight: there will be a Black/Red (or it might be Black/Yellow) wire form that switch coming to the headlight and it goes to the middle fuse on the fuseblock, then back to the headlight to provide the power to the lights. It returns to the headlight usually as either Brown/Red (if Honda did it) or as Brown/White (if the assembly tech did it backward, still works), then supplies power to the lefthand switch Hi/Lo switch, and as Brown/White to the rest of the lights. Just unplug the Black/Red from the switch and plug the returning Brown/Red into that hole and the lights will light up again. You will not be able to turn off the headlight, though, during Start.
If it is the switch, you can get a new one: if you have a halogen headlight, it will melt again. I make a relay kit that will stop this nonsense...
