when i got my quad last week, the airbox was caked w/ mud and other sh*t. i figured out that the cause of this was that the plug on the bottom was missing completely. what could i use to plug that so i can remove it easily, but it won't fall off. i also tried something new: i drilled a bunch of holes in the airbox lid, then strapped a book sok 2 the top then bolted it back on. this allows for less restricted air flow, and a dual filtration system. on my 250 ex though i just took the lid off and stretched the book sok over the box, and it hasn't fallen off yet. kind of off topic, but i can't ride either of my quads right now because my 250 has 2 flats, and my blaster has no front or rear brakes: i bought it that way, but i only paid $600!B-) anyway, what do you guys think about my airbox system? oh, also, what's the big deal about getting a larger air box? it seems to me if you have good air flow, you wouldn't need a larger one, right?