Hi guys, kinda new here never posted but I think this could be important. Well Ive been riding my 98 f3 for a while like 30,000 miles now, I know the carbs very well. I don't know everything on the bike but I'm learning. Last month, out of the blue I leaned it down to turn left onto the freeway and spun out and ate cheese on my left side. Limped it home, noticed it leaking on the left something that looked like Frappuccino. Never leaked before as I have a nice driveway and I am very conscious. Took it apart, found oil in the cooling system. It seems enough oil filled the coolant bottle and discharged out the overflow right onto my left side of my tire. It could have been way worse and I'm still here to talk about it. Change these o rings guys.