Kawasaki must protect the equity of the widows and orphans who have their life savings invested in the company!
Thus, I can see no responsible motivation to invest the capital required to fuel-inject the KLR650; research, development, logistical support, etc., would hardly be funded by the enterprise, IMHO. Further, FI would doubtless drive up the price point, I'd imagine, perhaps trimming sales/profitability/market share.
I think I've mentioned some economic facts of life. I regret any disappointment in the absence of FI, but . . . FI is hardly a cure-all and panacea. I acknowledge the advantages of FI, but . . . a carburetor can provide an optimum air/fuel ratio to the engine most of the time.
If you want a KLR650, I'd recommend you buy it now, in contrast to waiting for fuel injection. Could be a long wait, unless a government mandate awaits, an unlikely possibility, IMHO.