Too bad that you didn't have this posted a week ago. I just went out and bought an OEM carb for my 200t. The accelerator pump must be toasted in mine, I installed a rebuild kit it ran a little better but not like it should and would constantly stall.
Then I bought a $10 carb off of flea bay and it ran better but would lean out and shut off, I could turn the low screw the whole way in and the whole way out and it would virtually have no effect . Then I found out that the time period that I bought the cheap carb they had a bad run of them at the factory.
So I ended up going to the dealer and coughed up the money for an OEM and now I am grinning ear to ear.