So after I took my WR450 on it's maiden voyage and slid out in an ankle deep muck/mud pit. The engine stayed running, and was only down for about 3 seconds. However, there was visible mud on the inside of the bottom of the breather hose. Does anyone think dirt made it to the top of my engine? I immediatly rode back the the truck and changed the oil. Should I warm it up and flush it again?