Astrid: More Electrical 101

So I'm starting to understand the role of voltage in the overall system.  I'm pretty sure that when I was having issues starting recently, it was simply due to the fact that the battery wasn't putting out enough voltage to start the bike anymore.  I also clearly saw that just cranking it over and over again (causing spark but no start) is a sure way to drain any battery.

I feel like something about the rectifier wiring also affected the battery drain, but I have yet to prove that or understand it completely.

But I am sure that 5.9V is not enough to start the bike.  And on the flip side, 6.4V is indeed enough.  Not sure what the bare minimum is yet.

Also replaced Astrid's very perished rubber air hose with a 1 1/2" ID tube which I think is meant for a lawn water hose or something like that.