You can buy the Mikuni's with or without a choke, they supply a choke as a road option but the TMR's are really a race carb same as the FCR's.
Most race bikes are set up to run at high rpm and so tend to need throttle to run, 3000rpm tickover.
The flatslide smooth bore carbs will flow between 5 and 10% more air/fuel at the top, BUT, the slide is direct to the throttle cable (no CV) and can be hard work on a road going bike when you use lots of part throttle.