hey guys im a newbie to the forum i had a cbr250rr and it got written off in a crash so recently brought myself a nsr250r/mc21 and its great, a bit more of a dog than the cbr but heaps more fun, anyways i recently done an a modification on my airbox noticed it goes better heaps more noise from the engine aswell which is a good thing but i when taking off from lights and crap gotta give a few more revs than normal, so just wondering have much people done this mod aswell? do i need to get it rejetted? any advice on this would be tops and what other kind of mods are good for it?