Inside the carb body are the primary and secondary venturis. These are held into the carb body with two screws each. The venturi need to be removed for cleaning. Before removing them, identify the primary and secondary. It is very important that these are not mixed up during reassembly. I got lucky and the venturi in my carb are exactly the same, still I kept these separate and made sure they were put back in the same place. In the photo below the primary venturi is being removed. The primary venturi is the one right next to the “big ball, little hole”.
Each venturi also has a gasket that will be replaced with one from the rebuild kit. Here are both venturi and you can see the gasket.