Pete, Thanks for this fix.
I cranked my XS late yesterday for the first time since a rebuild that included a rebuild of my carbs-- gas was gushing out of one end of the Tee so I carried it to the nearest Yamaha dealer who told me he was out, the Tee is no longer made and a Yamaha dealer in New Jersey has the last two in the world. I called the NJ dealer and was told they had just sold their last two and would not be getting any more.
So I came to the forum and searched for "carb Tee" which brought me here.
An hour later I was riding again.
Thanks!