Carb Tuning

Been trying to tune the carbs so they are not running so rich. Well after a couple days of messing with it, I was able to get it to a decent tune, but its not where I want it still. It would appear the return spring on the first carb is not strong enough as it is off by about 1/8 " sometimes. Not all the time, just every now and then causing it to idle high. A couple revs of the motor and it returns to normal.

Here are the pic of the linkage setup: