Took a trip to Kennedy Meadows this weekend... Changed the oil Thursday before we left. Checked it with the bike warm, and the level was right up to the middle of the cross hatched area of the dip stick. Rode a 40 mile loop of nice, easy riding and a 20 mile loop of pretty tight, slow going singletrack. Checking the bike over that night for the next day's ride, and the oil level was down...way down. Took a little over a pint to top it back up. No laks apparent anywhere. Went for a 20 mle ride the next day, and no change in oil level upon return. I have two questions...1) has anyone experienced this kinda thing before, and if so, what caused it? and 2) Wadda ya think...did I do some damage running with the oil that low? No funny noises coming fromt he motor...or at least, no funnier/louder than normal.