http://faq.ninja250.org/images/a/a7/..._Schematic.pdf
Schematic shows four. Odd. Take a picture if you can. Maybe one wire is very short. Solendoids use one complete circuit to flip a switch that completes another circuit. Two circuits, both have an power wire and a ground wire. Four total. Maybe I am missing something. I will check my bike when I get home.
Did you check the push start button switch?