Hi Piratez.
I'm really enjoying the new Assault Bike. A wearable HWP was a crazy cool idea.
Two problems found so far, my apologies if already reported:
1) Ammo is not automatically loaded, you have to click and drop an ammo belt into it at the start of each mission. (Ufopedia article specifically says this should happen automatically, which is why I mention.)
2) Ammo appears to be totally consumed, regardless of how many shots were fired. I made 5 belts, went on 5 missions, and now they're all gone despite only firing about four times. If I had to speculate, I'd say that the Assault Bike MG is not playing nice with Statistical Bullet Saving, but that's only a guess.