I have about 275 total miles on my 2004 WR450 and I was draining the oil and out came a cloudy greenish-whiteish liquid. I then poured in a quart of oil and road it around for about 5 minutes and drained the frame again and it looked almost identicle (cloudy, less green). The first oil had one harescramble and practice on it (~50mi) but had sat in the bike all winter. I checked the radiator cap and coolent was right at the cap. I have no idea if the reservior is down or not. I did fall in a shallow creek and stall once during the race. It started right up and I road about 20 more miles. Any ideas?