20 - 22 mm
Hold the carb so that the float arm just contacts the fuel valve needle without compressing the needle. Measure the distance from the float bowl mating surface (without the gasket) to the top of the float. To adjust if needed, remove the float pivot pin and remove the float and fuel valve assembly. Remove the fuel valve from the float. Adjust the float by bending the adjust tang on the float with a screwdriver. In other words, get a Clymers.