Yesterday, I flushed my bike's coolant and today, I took it for a ride to make sure everything was fine, there was no overheating or strange noises. While riding, I felt air hitting my right leg but figured it was just my pants. After getting home, I found my right side cowling hanging loose with a clean, even scrape along the paint. I didn't drop the bike or lean too far, it looked fine during the ride. Any idea how this could happen?