Looks to me like they increased the size of the throttle body by zooming in the camera lens.
Seriously, though, it's just a motorcycle. They are endlessly moddable, limited (in this case) by the strength of the CVT system. I imagine you can get just about as insane with mods as you wish; especially if you have good life insurance coverage.
It seems to me that a major limiting factor is the stock exhaust system. It's obviously designed for emissions and quiet. I wouldn't mind gaining a little free power at the expense of the bike sounding like a proper motorcycle.