Ok, this is where you have to look.
The red/yellow wires are disconnected somewhere between the coil and the Engine Stop switch on the handlebar.
You have power getting to the handlebar switch..It's just not getting to the coil. It could be a bad switch or a break in the yellow/red wire.
The wires from the switch should be in a black vinyl loom going from the switch along the handlebar to the coil.
The yellow/red wire has a bullet connector along that wire...possibly within that loom.
You need to measure the voltage of that wire at that point. You can slide the probe inside the connector. Make sure the probe is touching the connector.
Positive red meter probe on red/yellow connector. Black negative meter probe on negative battery terminal.
Meter set to 20V DC
Bike on. Engine Stop switch set to Run.
Tell us what the meter says