Hey guys...I am a total rookie mechanic, and I have a couple questions if you wouldn't mind helping me... 1) Just bought a new K & N filter for my '99 WR 400. I took out the old foam one along with the plastic insert with a screen in it. Was that right? Should I have tried to leave the screen insert in the K & N filter at all? 2) My bike runs real well overall. I have good throttle response, and plenty of power for me across the range. The only problem I get is when I am cruising up something like a hill climb and kinda punching it, then i get to top and lay off completely...or other times when I am getting on it, then immediately bog it...it DIES. Any ideas on what could be going wrong here?