Was returning to my bike the other day, and noticed this black tube thing hanging down close to the chain.  It actually had some wax on it, so I'm assuming it was brushing up against the chain (bad) or getting some fling (not as bad).  Doesn't appear to be any damage.

For the life of me I couldn't figure out where it was supposed to go, so just tucked it in the linkage?

Its supposed to go to the right and under the motor. That is the air box drain.
Cool.
Buddha.