I changed the oil in my 1150 GSA and got the level in the middle of the window. I use the center stand to park it on overnight and to change oil. The level stayed correct for several rides. I came home and parked and used the side stand for a few hours but still came back and put it on the center stand that night. I happened to check the oil next day and there was none in the window. I started it up on the center stand and ran it for a short time and shut it down thinking parking on the side might of made this happen, no luck none in the window after overnight drain down. So i put the level back to half in the window. Go for a 100 mile ride and check the oil and the level is to the top of the glass. I am not making this up but wonder what is the correct way to get the level where it needs to be?