There is also a Light Green/Red wire coming off of the CDI it goes to the gear position switch, neutral indicator light, and feeds back to the fuse box to a diode where the wire changes to a Yellow/red wire. The Light green/Red wire and Yellow/Red wire provide power to the starter solenoid. If you have the OEM service manual there is a pretty good wiring diagram in the back of it. I Kind of doubt your problem lies in this circuit, but thought I would include the info. Hope you find the problem.