Ok, i was in the Kawasaki shop the other day and i was talking to a person who owned previous Kdx's and he told me that to get the biggest gains out of the bike go with a pipe. He told me though not to bore it out..or is that the same thing as porting. He told me that it would suck the gas..is that true? I want to enjoy the ride not having to go back every 10 minutes to refill it!!!!! Thanks to anyone!