You know, I can't answer that question because the manual doesn't say.I don't screw mine in to check, because every motorcycle I've owned (just over 20) that had a dipstick, you didn't screw them in to check. I think most here will dissagree with me on that though-we'll see.
Also, if you overfill a little you can just use a drinking straw and insert the straw,plug the end with your index finger, and pull it out. It will pull out some oil each time you do it until your happy with the level, and no mouth useage. And,yeah,the factory owners manual isn't the clearest on these issues.
Jon