BTW, here are the steps to change the bulb for others looking.
(1) Take out the seat bucket: 4 nuts, 2 bolts (all 10mm), 1 screw (at the front).
(2) Unbolt seat latch mechanism: 2 bolts (10 mm). Try push it to the side to keep it out of the way. Filler-cap is useful here.
(3) Remove rear grab-bar: remove rubber grommets, then undo 3 bolts (12 mm).
(4) Undo 2 retaining screws on central duck-tail panel located around the central anchor of the grab bar and directly above-center of the rear light assembly. A bit of manipulation should have the panel just snap out.
(In retrospect, I am not sure steps 3 & 4 are absolutely necessary. They give you a little more room to work and see, though, and are not a hassle)
(5) In the hollow beneath where the duck-tail panel had been, look for and peel back the rubber sock protecting the bulb-socket.
(6) Come in under the frame bar with long-nosed pliers, gently rotate the bulb-socket 90 deg. to extract it from its housing in the light assembly and reveal the bulb.
(7) To re-assemble, do the reverse of the above.
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