CARB PROBLEM ON Z650?

HI JUST GOT GARBS CLEANED NEW CARB KITS NEW AIR BOX RUBBERS NEW PETROL TAP PUT IT ALL BACK TOGETHER STARTED FIRST TIME RAN ALITTLE LUMPY SO I BALANCED THE CARBS RAN MUCH BETTER I TOUGHT THAT WAS IT SORTRED WEN FOR A SHORT SPIN WOULD NOT P 70 MPHSO I RESET THE PIOLET SCREWS TO 1AND A HALF TURNS IT HELPED BUT DID NOT SOLVE THE PROBLEM CAN YOU SHED SOME LIGHT ON MY PROBLEM