Turn 1: you can put all 4 tires beyond the left side of the blue and white kerb and the lap still counts Turn 2: "Touching" the orange sausage kerb on in the inside will invalidate the lap Whatever number the turn after sachs curve is (the fast left, right before the drag strip): putting two tires on the left kerb invalidates the lap - Not 100% about this one but I remember getting a lap invalidated and thinking that can't be right
Can you share a screenshot of Turn 1, how far you went? Some other places on the track are reported, but that one, I could not reproduce.