I bought a 03 predator two weeks ago and it has a k and N and a pure polaris exhaust on aftermarket headers. i dont know if it is jetted or not but when i am going at atleast midrange rpms and pull in the clutch the bike will stall if i dont give it a litle gas. i think it might needs jets but am not sure. if you think it does do you know what size jets i would need. thanks