It also comes from the battery, In the wiring diagram, the newer color is red, older units blk/brn.
For some reason there is power jump and flow back to and from ecu.
This separation has stopped the fuel pump and injector from dumping large amounts of fuel into the intake. Ecu scrambles its self.
Diagram can be found at the end of service manual.
I think you should take your heels out of the ground and get them on the floorboards.
The Usa has not understood how this fix will work. But it does, as there is multiple problems in the main harness to say, that only happened in a small lot of cables.
I have worked together with the engineer at the factory with this problem. And we have applied it with success.
Also went over it with Joe the service manager for CFmoto usa, in the factory and over dinner.
I'm sure they will have some kind of answer in the future for you.
Till then, jump it with a new wire and go ride.
Let me know if you have any other problems I can try to help you with.