Very weird! That is exactly where it should be and what it should look like lol. Very weird it has no way of turning it. As you say, it isn't an immediate concern if the scoot is running ok, however it is something you may need or want to adjust in the future (if you decide to take it up any mountains) or you notice it is running lean. There are ways of getting it to turn, using a dremel to make a bevel for a screwdriver would be one I guess. Replacing the entire carb would be another, given they aren't expensive. Very very weird it is not adjustable, I wonder if they set it correctly in the factory and do that to stop us messing it up? Then again they cannot know what altitude we would be using it at either.