TCR Mikuni 24mm Carburetor24mm Mikuni carburetor, the same one included in our complete carb kit. This FLAT SLIDE SMOOTHBORE design cuts down the turbulence in the bore throat to increase air flow efficiency. Smoothbore design eliminates various orifices and obstacles in the carb throat which cuts down the turbulence to increase air flow efficiency. Using this carb does mean you need to block off the oil pump and use premix. You will also need to, if you haven't already,