banshee stroker cut out.

[clinton588]

i have a 98 shee, i put a 4mil stroker w/ 5mil long rods, 30 mm carbs, v-force reeds, cool head w/ 22 cc domes at 150lbs of comp., & toomey t4 pipes. my question is that on top end when it starts to hit it's peek it starts to cut out like it's running out of fuel or hitting it's rev limiter or somthing like that. i tried to play with the jetting i went up and down with the main, i changed the plugs, just about every thing i could think of. can any one help!!!