32mm Tm Series Flat Slide Carburetor The 32mm RAD Powersports TM Series Flat Slide Carburetor features a flat slide design in a smooth bore venturi for improved throttle response and wider powerband. The float system with independently moving floats, along with the main jet enclosed in a baffle chamber, allows the carburetor to perform smoothly even on rough terrains. Available in 35mm bore sizes for 125cc race engines and 38mm bore sizes for 250cc race engines.