If it were me, I'd get a new set of coils and sparkplug wires from
www.z1enterprises.com
as stock coils on the older Kawasaki's were marginal new.You might be spending money for coils that have/will go bad soon.
Accel or Dyna 3 ohm coils should work. If unsure, get a multimeter and measure the resistance of your old ignition coils.