I'd stay away from that project !!! Fuel injection is far more complicated than throwing some parts together with a butterfly valve.... You'd have to have a computer to get the injector timing right, a fuel pump to provide the proper pressure, and some tiny injectors to provide the proper spay at such a low volume of fuel....

How about some cleaned up carbs that are tuned right ??? They do make the same power(as stated by 80xar), though not as smoothly as a fuelie.... But it's what the bike was made to use.

I know I'd hate to trash 3-5 engines trying to get it right
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MC21
04 NSR50R
93 CBR F2
98 CBR F3 track bike
95 VFR750
89 FL400R Pilot
90 FZR 4/600