Fuel Level/Float Height
Kawasaki calls the "fuel level", "Liquid Level". Liquid level is far more accurate (than float height) as long as the carb is placed in the correct relation to level as it was designed to sit. Three cylinders and Z/KZ series engines place the carbs relatively level in the chassis, and other bikes and carb sets angle the carb a bit. Set the liquid level the way the carb was designed to get it set, level, adjust from there if the carbs are angle mounted.