Holley Carb/squirters+jets ?

I would try downsizing the squirter on the front and see what happen's. You may be shotting to much fuel at once. What size pump you got, 30cc or 50cc and do you have the hollow screw for the front squirter? Also check your adjustment on the accel pump. Make sure you are just touching the lever at idle. Check the cams on the linkage too to make sure they are adjusted right and not worn out. Move the throttle and make sure you are getting a clean shot of fuel. Look for the obvious stuff first and if everything is fine then I would go to a 35 in the front and see what happens.