my bike has been overheating so I was gonna take the right side crank case off to look at the water pump. I drained my coolant, but didn't want to bother with the oil cause it wasn't milky at all. I tipped the bike on it's left side and the carb started leaking gas out of the tube on the bottom, but when I stand it back up the leak stops. Is there something wrong, or is this normal. Any response is much appreciated.