Did you grind the venturi's to a larger diameter?
If you did there's the reason for the overly lean condition you describe.
You no longer have the pressure differential required to pull fuel.

How do you know you flow more air - without having the carb on a flow bench?

A 125 jet is pretty big.

You're aware that part of the lean/rich ratio changes are accomplished with a change of rods are you not?

Float levels change lean/rich ratio's as well.