Second tank: 52.8mpg.
However, it's been a while since I've had a functional bike and I'm... playing... too much.
Even with that, it's 2.5 times better than the truck, so it's all good.
With it being a torquey twin, I figured it would be geared lower. Highway cruising is about 5000rpms at 60mph (GPS, not speedometer which is off about 10%). That's about the same as my old '01 ZX6R (I usually got 45-50mpg with that).