Your bike is fuel injected and doesn't have a petcock. Instead it's got a quick coupler that the pressurized line connects to. There is an o-ring inside the coupler that is serviceable. Part number is 11323A. It's a little tedious to change them but it is something most anyone could do.
Is the primary leak the primary housing outer to inner or the derby cover sealing to the primary cover? Whichever do the obvious. Try snugging it up first. If that doesn't prove to be a panacea then replace gaskets.
No Don, it's a Harley. I believe Panacea is won-dem eye-tallion modersickles.......

(
yes, I know what he means guys....just throwing some humor in the mix)
Just to throw this out there, there were some issues with the shift shaft seals (say that fast three times...) for a few years, too. Mine leaked and was changed under warranty on my 09 (my SG and my wifes Dyna Low rider) and my '12. My buddies '12 CVO RG also leaked and was replaced under warranty. This can give the impression of a leaking gasket. So, if tightening the gasket doesn't work as twolane describes and you replace the gasket to find it still leaking, this can be something to check next.
Good luck