Man, that post is hard to read!
FI systems on dirt bikes are NOT CLOSED LOOP.
The only thing they adjust for is air temp and air pressure. They do not adjust for O2
or fuel in the exhaust.
They do not alter fuel/air mixture at all, outside of idle, beyond the map
that is installed.
They have no post-combustion sensors that could monitor Fuel/air mixture.
They compensate a few percent for air pressure and air temp.
An FCR carb goes from 0ft to 8500ft without any issues. Yes, it becomes less powerful when you go up in altitude.
FI will act
the same, only not as much drop in power, as it will compensate a few percent for the 'pilot' stage.
Having 'infinte' adjust-ability with FI, is a false premise.
It either runs correctly, or it doesn't. Fuel/air mixture borders on 12.5 at all rpms, or it doesn't.
You can't 'add performance' by changing the 'jetting' (FI settings), unless the 'jetting' is wrong to begin with.
Once it is correct, you are done.
What you are altering is the IGNITION MAP
to change the bikes characteristics.
That's what the little 'plugs' that come with KX's, or the bar switch on KTM's do.
They alter the ignition map
, not the FI.
So, if you like 'graphic equalizers' on you stereo system, thinking that it can improve the sound of the stereo (it can only make it different, not better), then you might like the 'infinite adjust-ability' of FI, but there is only one setting of FI that is correct.
Ignition timing curves are a great way to adjust the bikes feel. But these have been available way before FI.