My 03 450 is leaking oil and I cant tell where it is coming from. I noticed it dripping out of the bottom of the bike. When i checked the dipstick it started pouring out of the dipstick hole. A rode about 5 minutes and the oil stopped leaking. I checked the dipstick again and it was normal. Rode another 6 laps and called it a night. Checked the oil this morning and the dipstick is completely dry. Any ideas? Also what is good suggestion for coolant?