This will give a bit of an understanding how carbs on the FZR work and why they used this type. These Su's are very similar in operation to the Mikuni's. http://en.wikipedia.org/wiki/SU_carburetor
Here's another good read on setting up carbs. Not exactly the same carbs as the FZR, but if you want to setup your carbs, the info is very useful (e.g. the function of each jet) http://www.transworldmotocross.com/mx/how_to/article/0,13190,1018579,00.html