I HAVE AN 04 400EX WITH THE 440 KIT (WISECO), STAGE 2 HOT CAM, FMF SLIP ON, MOOSE RACING JET KIT (160 JETTING) , WITH MOOSE REV BOX , UNI AIR FILTER W/LID REMOVED AND A 15 TOOTH FRONT SPROCKET. IT DOESN'T FEEL LIKE IT HAS THE POWER THRU THE MIDRANGE AT HIGH RPM'S LIKE IT SHOULD AND IT REVS OUT CAUSING IT TO FALL ON IT'S FACE WHEN WALKING A WHEELY. THE MOOSE REV BOX IS NOT SUPPOSED TO HAVE A REV LIMIT BUT IT REVS OUT. COULD THE REV BOX BE BAD. IT RUNS GREAT AND HAS GREAT THROTTLE RESPONSE UNTIL I HIT HIGHER RPM RANGE THEN I HAVE TO LET OFF THE THROTTLE SOME. I'VE ORDERED A 16 TOOTH FRONT SPROCKET, WILL THIS HELP OR WHAT OTHER MOD SHOULD I MAKE?