Join Date: Jun 2019
Location: New Brunswick, Canada
Year/Make/Model: 2001 Vulcan 800 Classic
That’s a camshaft seal with an o-ring... certainly possible it could leak. If you have oil elsewhere you really need to chase down the source, so cleaning things up is a great idea. Off memory (been staring at my heads for a week).... that plug, the coolant lines, and the valve cover gasket would be the leaky points.
But oils and gas love to travel... so clean it up to be sure. And be careful with that cleaner around rubber (depending on which you use)