After trying everything possible, including replacing the wiring harness (used one) I replaced the regulator with a Kawasaki OEM part $131 not cheap but it's charging now. Those cheap aftermarket regulators are not compatible with Kawasaki's electrical system. I tried three and none of those worked. I have a 98 Honda 300 4 wheeler and I put an aftermarket regulator on it about five years ago and it still works OK.