I have a pretty much stock 89 cr250 2 stroke. It never has leaked crankcase oil from anywhere before. I went out for a 10 min ride today for the first time, got back, then went inside to get a drink and came back out and there was about 4 drops of case oil under my bike. It sat for about 3 days prior, and wasn't leaking. It only started to leak after i rode it. The oil is coming out of the end of the crankcase breather tube on the top of the crankcase. (Not sure if it's a breather tube or an overflow...). Please someone help! Going riding this weekend and this won't cut it. I am holding the tube in the picture.