Saw you mention your wife's 250 in a different thread and it reminded me shoot you a link on this one. Apparently people have had good luck with this, I may get it and install it in my g/f's 250(one day).
To heck with carbs, make it FI
(If you plan to keep it for a while anyway, kinda pricey if you're gonna swap it fairly quickly)
Kawasaki Ninja 250r Fuel Injection Conversion Kit - Small Engine EFI Conversion kit | fuel injection kits
To heck with carbs, make it FI
Kawasaki Ninja 250r Fuel Injection Conversion Kit - Small Engine EFI Conversion kit | fuel injection kits