In our area of the country, few people run carburetors. Before we developed our fuel injection program in 2003, the Keihin FCR flat slide style carburetor was our choice. Most people who run carbs today run the Yamaha R6 carbs that came from the factory on the '99-'02 R6 motorcycles. We still stock quite a few parts for the FCR style carbs. Find our listing of FCR parts here.
Here is a document summing up our experience with the Keihin FCR carbs and some useful information about them.
FCR Carburetor Sheet
Click on image below to open a larger view of the Keihin FCR Carburetor Exploded View.