The fz is only down about 5hp to the same year R1 and retuned for slightly more midrange so don't worry about that.I had an '01 fz and its a great bike with a great engine,the carbs are easy to deal with and tune with loads of info out there(fz forum).The only common problem with the carbs is the pilot jet(idle control) is very small and prone to plugging,I had to pull mine to clean them(hint-small guitar string is perfect for use as a pipe cleaner)but had 0 troubles after that.Just run some carb cleaner every few tanks as extra protection.
These carbs also work great for boosting through,I built a 4ag with a set fed by a td04 and worked very very well.
http://youtu.be/HjdvM3aS0TM Fz vid,100mph is about 12 o'clock on the speedo.
http://youtu.be/CXRncYoJ42k