got a new yz450f last week and completed my 1st oil change today. I warmed the bike up for 3-4 mins then I took out the two drain plugs out and drained the oil and changed the oil filter. I then added 1.1 liters of oil per the manual. fired it back up for a few mins, turned it off and checked the dip stick. when I took the dip stick out a lot of oil gushed from opening like there was to much oil in the bike. I would say 8-10 ounces overflowed into my floor. What would cause this? is 1.1 liters to much? Somehow did I not drain all the original oil?