Yea, that one is the most of a fiddle. I did mine without removing the tank but I know some folks have. I can be done with patience, but I had the bulb fall inside the headlight unit and fished it out with a wire coat hangar! Good fun! I dont know how you wiring conector has become siezed onto the bulb though! All you can do is wiggle it side to side, but if you can undo the clip you may bring the bulb away with the wires still connected, and deal with it then.

Good luck!
Steve