Lessons learned on EFI. The new Triumph has Keihin EFI. There is a program and hardware called TuneECU that loads, modifies, and unloads maps. It also has diagnostics and other tuning features, like synchronizing the throttle plates.
The bike ran good before I "improved" it. The changes I made are the ones done to the carb models. A pair of hotter cams for the 790cc model, removing the two noise baffles in the intake system, and putting on a pair of Triumph TOR off-road mufflers. All of this I had in my parts collection so no money was spent. So far, all is OK.
Next, I loaded different Triumph performance maps for fuels with 10% alcohol and 25% alcohol. I could get it to run good and get lousy gas mileage, or I got it getting good mileage but running bad. It took some figuring to solve this one.
The EFI cannot directly sense the need for fuel. It bases its decisions on manifold air pressure, throttle position, rpm, lambda, and other data it collects. The EFI system was not calibrated for the changes in flow the flow vs manifold air pressure relationship from my intake changes. The system was confused and it did not always provide the right mixture.
The noise baffles were reinstalled and the adaptation process was made to recalibrate the system. Now it runs great. The cams and the off-road mufflers do the trick.
What I learned is the EFI system has the ability to adjust to a small amount of performance tuning. The changes should be made downstream from the intake manofold- unless the EFI is remapped.