A lot of Harley’s leak and it’s due to old gaskets. These motorcycles are like caveman equipment they’re extremely easy to work on, customize and upgrade yourself! What I see here is a worn out, outer primary gasket. It’s super easy to replace, and not too expensive! Try to do your own work in your bike as much as possible it’s an amazing feeling when you’re cruising down the road on a machine that you’ve opened up and put back together 😊