My baby 125.....

[Water Warrior 2]

Suzuki as well as the other manufacturers certainly have the technology for FI but will they do it? Dropping their North American GZ production is probably much more cost effective while continuing to make carbed bikes for the rest of the worldwide market which is huge compared to NA.
I think the TU250 is actually a very common bike in other markets and easily converted to FI just for NA.