[natedizzer]

your not getting enough air.....you can either adjust your a/f screw or go to bigger tube....i had that problem when i used 1 1/2 hose so i changed to 2 in.....then rejetted.....i would suggest going bigger on your hose.....i used a shop vac kit i got from lowes....i think it was actually 2 1/2 in. but it works great