snowflake...responding like a boss! Awesome advice! The only thing you didn't say was to study harder in sKhool.if it was still running when you washed it, I can assure you the drain plug hadn't been missing the full 40 minutes.
I would get a cheap oil, like rotella t, fill it, drain it, and if you notice water, do a series of oil changes on it, when you get all the muck out, I would then fill it and ride it and see if anythings messed up. If its still running now then there isn't any catastrophic damage.