you need to reclean the carb. this time, run a piece of wire thru every hole you find in the body and its parts. make sure the bowl is on in the right direction.
also, check your head bolt torque. 10 ft/lbs is what they need to be. install an air box if you dont have one. the mixture screws on all hondas are a long taper. so they dont change much at all when you adjust them. it takes years of fine tuned hearing to know where thwe right setting is. 1 1/4- 1 1/2 turns out should be good.