To keep from dripping oil down the side of the transmission, lean the bike to the left side while you remove the level check bolt. Put a paper towel over the hole and then slowly tilt the bike back up straight, holding the towel over the hole. Carefully pull back the towel while watching for for oil. If you see oil, the level is ok. Tilt the bike back to the side and reinstall the check bolt. If it's low, add a couple of ounces and check again.