Guys I'm almost convinced Yamaha changed the A and B settings on the new 2017 version. I think I remember reading About it and being told it matches the same at the MT10.
Having ridden the 17 bike just a few days ago I got the feeling there is a NOT a lot of difference between A and STD (if anything STD felt sharper) BUT B was definately down on power and needed a lot more throttle for things to happen.
This is the same order than previous model : A (sport) Std (every day use) B (rain)
BUT the A mode of the 2017 is not the same as the 2014 model, it's much less violent.
The difference between A and Std is mainly under 4000 rpm.