And after reading up on the subject you will (unfortunately) still just be speculating. :icon_scratch:It will work fine without the air box but you need to understand first what the air box contributes and therefore what you will lose without it. I've got some books you can start with
If someone really wanted to know they could dyno the bike, pull off the "suction pipes" between the throttle bodies and air box, clamp a pair of K&N's onto the throttle bodies and do another pull on the dyno.
That would give you an idea of what the airbox is, or isn't, doing without any mods that aren't easily undone. ccasion14: