Please check the KLE tips and tricks forum for the electrical problem I had as well. Also download the pdf file from the link I posted there. I had 2x bad connections, including that white wire, on the connector under the the tank. Clean out and lubricate that block, and any others you can lay your hands on. Please follow that charging faultfinding diagram, as this bike does not run with a flat battery, and a new regulator is about $200USD.
If its stupid, but it works, it aint stupid.