Kraven is exactly correct - thank you for your knowledge and input.
Regarding elevation changes in reference to the fuel map....
There are plenty of schools of thought on this issue and many users will alter their fuel maps for different riding areas. The PCV will not change its fuel map to self-compensate for the different air pressures - instead the ECU still is compensating for these changes and the PCV will piggyback on these changes.
The beauty of a percent based system within the PCV, is that is solely relates to your engine efficiency. If you increase the airflow through the engine via pipes, intake, big bores, etc., your fuel flow must increase in the same amount to keep the burn at acceptable levels. If your engine is making 10% more power, it needs 10% more fuel than what the ECU knows - Always - at every condition. One elevation will not be different than another.
Instead, what is occurring, is your machine is now changing its operating conditions based on air density. All of your clutching parameters must be different when making less power at altitude. People might think that the fueling is off from a lower elevation to higher, but usually the cells that are being hit in the fuel map are slightly different. For example - to run the trail 40MPH at 6800RPM at low elevation might take 40% throttle....now at high elevation, those same conditions of 40MPH and 6800RPM could require 44% throttle solely based on the lesser air available.
The internal engine is not requiring a different "added" fuel amount (other than what the ECU is altering already) because it's efficiency did not change...only the conditions.
If this sounds odd, know that it was also hard for me to wrap my head around it at first based on what I'd heard throughout the years.
~T.J.
