i have a '99 400ex with the 440bb kit on it and i want to squeeze a little more out of it. i feel like the 440 could use a little more with the intake. i can et a predator carb fairly cheap off a friend of mine and i just want to know how you guys think it would work out. i know the stock carb size on a 400ex is a 35mm and the predator carb is a 42mm. i know thats a hell of a jump and i am going to have to jet it for sure but i think the bb kit could use the better flow. any thoughts?