I searched high and low for the following service manuals and wiring schematic. I was working on a 1978 KE175, so the service manual only applies somewhat. Feel free to download them!
Kawasaki KE175 Troubleshooting Guide
76 77 78 KE175 Wiring Diagram
Kawasaki KE175 Service Specifications Manual
Kawasaki KE175 Service Repair Manual 1979 1980 1981 1982 1983