BTW, I'd be willing on betting that replacing a sensor is no more than putting a new rear tire on the bike - and I don't know about you, but I do that a couple of times a year. Do you think Kawasaki should be covering that?
Uninstalling the rear wheel, demounting the tire, removing a sensor, installing a sensor, syncing the sensor, remounting a tire, testing the sensor, re-balancing the wheel, and remounting the wheel is a pretty major operation.... and impossible without all the right tools, most of which are far outside the reach of normal people (Tire balancer? ECU programming?).
I certainly do not have to replace MY rear tire every rear, much less multiple times a year. Personally, I think the design is a bit insane. I keep thinking that, certainly, something could have been designed to charge the batteries (or use no batteries) from the available kinetic energy.