If I remember correctly, you bought that bike used; is it possible that it was already wearing a low fuel warning eliminator? That would be the easiest explanation of all, and there are quite a few of them out there so it would not be much of a surprise really.
It is an electrical circuit in the form of a harness that plugs into one of the two harnesses going to the fuel tank. It installs basically exactly as an extension cord, and so you can remove it and restore the bike to stock if you prefer. It is located behind the fuel tank; take a flashlight and poke around (Easy Boys!) in the well behind the fuel tank, find and lift out the two harnesses; if one of them has something plugged in-line in it, that would be the L.F.W.E..
If there is indeed a L.F.W.E. on that bike, then I think Incontrol should get a honorary mention, not for me but for Kirby and Mr. Elkhoof, (and now Young Miss Phoebe), the real producers of that product, because it would seem to have shrugged off a nuclear- sized cloud of angry electrons that have ravaged just about everything else on that bike.
Brian
But wait! There's more!
If you haven't been following the Plasma Ball saga this post will probably confuse the crap out of you. Not to worry. It will all make sense as soon as you take a great big sip of the cool-aide.
I purposefully rode the fuel tank empty today, to the point that it completely ran out of fuel and shut down.
I did not get the Low Fuel warnings. (Recall that the instrument cluster is a used replacement)
Due to a run-in with a Plasma Ball the original cluster did not indicate speed or increment the Odometers but it did indicate fuel level. Both clusters responded to fuel fills in a way that I would consider normal. The level gauge indication increased to "Full" when I put fuel in and lowered as I put miles on... but it didn't lower all of the way, on either cluster. I suspected a problem based upon what the original cluster was indicating but I didn't push it all the way until after I installed the replacement cluster. The final 2 LCD tank level segments remained on, the Low Fuel warnings did not "annunciate", and I ran out of fuel.
I, once again, pose a question to the Hive Mind. What the F is going on?