Well, this weekend was busy, but I set aside some time Saturday for tuning - came out to a battery that was reading 14V+ but would drop to ~3V under load, which isn't even enough to move the starter solenoid.
I called the LiFePo battery manufacturer (motydesign.com) and got all geared up to demand a warranty replacement, and in a hurry!, but by the end of the conversation he'd convinced me that somehow I must have discharged the battery below the 10V acceptable limit. Further, the shakeup of A123, the company that holds the patents for the Lithium cells that these tiny batteries are made of, has brought out a lot of fakes in the market, and he's waiting for a new supplier to come on line...so even if I bitched and moaned for days, I wouldn't have a new battery in hand by the time I need this thing to get to Kentucky.
So I put a big AGM battery on the side, like I should have done in the first place.
It's sitting on a metal support I made last night; will box it in with leather and perforated metal tonight. The right side of the bike is having all the fun now, though - with the whole exhaust system, big carb and breather, and the battery. So, to make sure the left side wasn't getting jealous, I put some stickers on it: