Now who wants to know how bi-metallic strip flashers function?
Let me guess.. the same way blinking Christmas lights do. The bimetallic strip carries the current from one terminal to the other. The current heats up the strip and being made of a bimetallic construction, it bends away from the terminal, breaking the circuit. Then, with current no longer flowing through it, the strip cools down, bending back and reconnecting the terminals. This cycle repeats until you cut the power to the turn signals. (Do I graduate? 
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Now, what I REALLY wanna know is why do Honda wiring harnesses have a spare green and a spare hot wire terminal just dangling in the electrical compartment? Did the serve some kind of diagnostic funtion, or a quality control test point during wiring harnes and/or bike production?
I'll have to give you a B because you didn't mention why the bi metal bends. Metals have different thermal coefficients of expansion. When you laminate two metals and heat them, one of the metals expands more rapidly than the other, thus causing the bending effect. Cool down is the reverse, of course. Sometime the flasher bi-metal strips are convex and/or concaved shape which allows them to snap into and out of position with the heat/cold cycle. Anybody remember those jumping frog toys as a kid. Press in the little dome (heated by your body temp) Set the little frog down and wait. When the metal cooled down, snap, and the frog jumped. You mean nobody else had to investigate why this worked?
I'm only aware of the dangling green wire, which I assumed was a hedge against the low voltages the bike can acheive if it idles too long with a depleted battery. Customer complaints about signal flashers can be easily addressed in the field, by puting in a flasher that wasn't sensitive to voltage fluctuations and higher wattage bulbs. It's easier and cheaper to address such issues on a small case by case basis than put a much more expensive flasher in the entire production fleet.
What Hot wire are you refering to?
