That is a mod I would like to see! I would love to have an FZ-07 engine in an R3. That would be fun.
Having said that..... it's not going to be easy! None of that stuff is a direct swap! You are in for some serious fabrication.
I hope you are good at welding. You will have to make new mounts and tabs. Also, the FZ-07 engine is bigger and wider than the R3 engine.
So the sprockets won't line-up. I am not even sure the FZ-07 engine will fit in the R3 frame, without serious modifications.
The R3 engine is tiny. The FZ-07 engine is considerably larger. Heavier too. IF you get the FZ-07 engine in the R3, your brakes and suspension will no longer be adequate. I hope you can pull it off. I would love to see it. Get lots of pictures, and make videos if you can, of the whole process.
As far as I know, nobody has attempted this yet.
2015 Yamaha R3 (Blue/Silver)
2012 Honda CBR1000RR (HRC Edition)