Renos,
That breather hole has caused much discussion about whether, or not, there needs to be a tube attached to it. Tube would route any oil that makes it through the breather channels onto the primary chain or, if you prefer onto the ground. I think it is safe to say that most A10's do not have a tube installed. I might be corrected by more knowledge members here.
Oh, and a big welcome to the forum.
Richard L.