With such low miles and being post-2001 I wouldn't think cam chain. Adjust everything. Easy firsts to me would be your chain and your valves. After that's it's hard to say. Sometimes cables, loose levers, etc. If your engine checks out and the wheels aren't falling off, I wouldn't sweat it too much. It's a naturally buzzy bike at speed and things are prone to shake around. Just make sure nothing important is shaking away.
Maybe drive by somebody and see if they hear it or if you can record it.
Also consider an intake leak or some sort. Unlikely it would give that kinda sound, but it's possible and very noisy when it gets bad.