I accidentally ran my 09 WR450F without air filter last night. Just changed the oil, oil filter, taken air filter out to clean. I cleaned the airbox out a best I could as it was a dusty ride on the weekend. I only ran it for about 2 min up the court and back into the garage testing out the clutch adjustment I done. I've ran out of oil and need my bike ready for tomorrow to go away. Should I change the oil or will it be ok?