I'm sure everyone is tired of answering questions in relation to jetting. But please one more time. I have the 400e and my snorkle is out. I have the FMF Power Core IV with the Power Bomb Header. FMF suggest using a 165 main jet. However they don't help you any further. I put the 165 in and it took away the hesitation at mid throttle but not completely. I then set the clip on 4 and then turn the fuel mixure screw out 2 1/2 turns. It is running pretty strong but I steal have a little(very little) hesitation at mid throttle. I am sure it needs only fine ajustments to perfect it. Any able to help?