I drive my bike I had just bought yesterday onto the interstate for maybe 1 miles hit about 80mph in top gear take my exit and as I'm coming to a stop there's clouds I can see behind me through the mirror each time I downshift/open the throttle it's billowing out it's a lot and thick and white. So I pull off and it's now only coming out as slightly visible directly behind the muffler. I let it cool down check the oil level and see it's over filled as in the top of the oil line isn't visible through the glass. I go to the store as planned bike gets another hour to cool. Riding home I keep it below 9k rpms and 60mph and it appears to be back to normal. I plan on draining the oil to the correct amount tomorrow along with a coolant check. Any ideas what causes this?