alpha14

I'm having some problems with my carbs running to rich, having replaced the heater and cleaned them the rear carb is seriously out of balance. I have checked the pilot screws and someone has shagged the head of the front carbs pilot screw. I have adjusted the rear one to the setting given to me from Suzuki. If i screw the sync screw in the rear just draws more vacuum and goes of the scale. Does anyone know which way to turn the pilot screw to weaken the mixture in the rear carb?

Thanks

Adam