I just pulled my XS out of storage after 8 years, started going through it. I checked the oil, had the right amount of clean oil, did a tuneup, and ran it for about 10 minutes. I decided to change the oil and found the oil mixed with gas, a LOT. I went through the carbs, cleaned them, nothing wrong there. Went through the gas and vacuum lines, no problem. And .... I'm stumped; how can gas get into the oil? What am I missing?