I have a 1973 Kawasaki G5. It was previously stripped down for use as a dirt bile. They ripped out the lights, battery, oil tank, air filter, and coil. I found a coil but am unsure of the wiring. I assume that the coil wire is the black wire in the wiring harness? Does anyone have a wiring diagram with color codes indicated? Without an oil tank, would it be possible to use a premix? I assume about 18:1?