Is your front wheel on correctly?
Have you tried a different battery? a new battery? Li-Po battery when is not balanced charged it will get damaged and under a load one of the Cells can drop and if the voltage drop below 12V could set that light which is because of the CAN bus.Agreed the orange light comes up for a number of reasons, not specifically the TC. Also heard it could be battery voltage (the bike starts off a jump battery, with a small Li-Po battery on the bike).
The dash doesn't flash any codes when I do the 2 second A+B button check
well, Lipo battery doesn't last forever, a 3 cell lipo battery without balanced charging only last a year maybe not even that. you should look into that besides searching in the bike ECU and electronics.Chiffee, it's cos the guy I bought it off was a talented racer, who wanted light weight, whereas I am a part time racer/track day muppet. It has a top quality battery on it, there is no chance of changing back without fitting a new fuel tank, the tank sits under the seat.
There is your problem, just because is flashed by woolich don't make it race ECU. but yet you running a race harness?It's not stock ECU, as per OP, Woolich flash plus it has race harness, and I have more than one battery, just fitted a brand new Li Po, but yo cant start the bike with this.
The idea of posting on here was to get some ideas, thanks for your input