If I read that right, that rearward facing cylinder has two fuel injectors. I'm very interested to read an English report.
Yep. Can't imagine a performance EFI 2T ever working properly with only one injector - the fuel requirements vary so much from idle to WFO, that a single injector will either be incapable of supplying enough fuel at full throttle, or will be very difficult to control to give a good idle and low throttle response.
The bike is clearly a prototype (uncovered battery terminals, crappy looking exhaust stinger, etc), but it's good to see some fresh thinking.