banshee911_01

Hi I got an 00 banshee with the following descriptions below. I recently installed some fatties and v force reeds. Now it bogs out through most of the powerband and has a slow throttle response. Rides slower than stock banshee in straight aways, and totally bogs out going up a hill or dune. I tried new fuel, spark plugs, cleaned filters, cleaned carbs and jets, tried swapping reeds with a friend, recectly rebuilt, tried 260-310 jets(currently at 260's), all needle positions(currently at 2nd to bottom), adjusting air screw, elevation around 300ft. So what else could it be ? Thanx