I am brand new to bikes, so I do not know the name of most the parts that are not on a car. Anyways I recently laid down my bike while taking it off of my porch, which sucks because that was the very first time I have ever been on it besides just sitting. Anyways I was using my feet to go backwards down the board I set up since my porch is like a foot off the ground. Anyways ramp slipped and the bike went with it and fell on its side. It is now leaking small amounts of oil from whatever the large bolt looking thing in the center of the handle bars. What do I need to do to fix this? It barely leaks but I dont want to have to change the oil in my forks or wherever the oil is coming from