I checked my oil level today. I warmed the bike up for a few minutes, shut the engine off then checked through the sight glass. With the bike vertical, the level was hovering about 2 mm above the lower mark in the sight glass.
Could this have caused any engine damage? I changed the oil 1000 miles ago with 2 quarts of oil and a new filter.
Also, the bike has a small leak opposite the side of the cam bore plug - near the spark plugs. This is probably where some of the oil went. I am going to fix this soon.