FZS600 has stopped working

[TOM VR46]

Just a wee thought.
You said you gave it full choke and half throttle and she fired, but anymore throttle and she died.
Try no throttle, even if sounds crap, just leave to heat up.
Again try combinations of choke, none and try, half and try , then full and try. No throttle.
Then same as above with a little throttle, but if she fires , no more throttle till theres a little heat in there.
A warn engine is always easier to work on.
And as above try to if she fires try and get some sort of easy start in there as well, even just all round carbs to make sure there all sealed up, and not drawing air from somewhere.