Bo,
Does your system have data logging capability? As I understand the ECUs used by the OEM manufacturers, they only involve the O2 sensor in cruising mode to obtain best fuel mileage in conformation with EPA guidelines. At anything over 85% throttle position, the system goes open and takes the O2 sensor out of the equation. At that point, the maps take over and set the pulse widths, ... period. There is no control unless there are some max exhaust gas temperatures that shut it down (but I doubt it). Therefore, because Triumph very likely didn't test their bikes/motors at WFO throttle for 3 miles at 100 degrees F, nobody knows what the actual results will be. I added some Innovate gauges with the Pocket Data Logger so that I can at least get actual temperatures and AFRs throughout the run. With luck, I'll be able to make changes after the first run if things look dangerously hot or lean. I haven't even started the motor yet, so I can't tell you more than that. About $600 plus a lot of wiring, but motor failures are way more expensive than that.
With your experience, you might be able to read the spark plugs to make decisions. But then, can you change the maps to increase pulse widths or change the ignition timing at selected RPM?
Tom