There's a tube from the back of my gas tank I think is leaking some oil. Anyone know what this line is for?

Got a pic or can you find it on a parts fische?

The only tube should be a drain tube and runs down the left side of the bike and ends near the clutch slave

You can see it and the front drain tube in this pic:

I would clean the engine ( I use WD40 and rinse it off) then hit it with your white powder of choice to find the leaks quickly.

Does it look like the oil has dripped to where it is now or seeped out?