I checked the oil on my YFZ for the first ride of the day and noticed that te level was extremely low. I added around 3/4 of a quart (wow alot) to bring the level up to normal. started the quad and took off on a test ride. Not very far out it blew out the dime size rubber plug from the front of the head. I'm guessing too much oil pressure. I got back to camp and drained all oil (looked slightly milky probably coolant). I then added new oil and started the quad. It then seemed to push all of the oil into the reserve tank with nothing left in the cranck case. I am ready to start tearing the engine down to find the problem and I am hoping someone has heard of this issue before.