Yamaha states: "Yamaha FI provides optimal air/fuel mixtures in all altitudes and wide range of temperatures for outstanding throttle response."
All FI systems do that. Actually they pretty much have to, to work at all. O2
sensor is completely useless in racing machines like this, it would help cruise, but since when anyone does that with an mx bike? It's all about pre-set maps. Only thing it could learn is some throttle enrichments and stuff, but those depend more on the rider specific "taste".
Now what I find interesting is the long intake. Exhausts have been tuned to give maximum power for ages, but on the intake side there has been no room for that really. New Yamaha
seems to have "tuned" intake. It'll sure be interesting to see how much juice you can squeeze out of these.
Off-center crank pin is not about "forces" or something, it's all about cylinder gas exhange and piston speed. Together with cam-profiles, tuned intake and exhaust
this should really be one impressive engine.