1. Not fully reversible as in Triumph can tell its been remapped at some point .1. DivaDanielle's tune is also reversible, just reload the original which is on the TuneECU site.
2. Then there is the factory AFR etc. It is designed to pass the DOT/EPA/EU5-4, not as blatantly configured as the VW diesel setup, but it meets the test criteria and is not necessarily the most drivable/ridable tune. The factory tune for all T120's is the same. The Speed Twin will all be the same but different from the T120.
I have always been so very confident - not, of standards and regulations created by people that have no technical experience.
2. I think @kdxandrew meant the power commander dyno tune would be specific to your bike and the AFR would be optimal, something you can't be sure of with a generic tune done on a completely different bike (also the case with the original factory tune obviously).