I'm curious - why wouldn't someone expect to replace a head gasket after ten years ? They are fairly straightforward to do one's self, although it is possible to get it wrong.
Several threads on here on how to do it correctly.
If it were my bike, I would be replacing that, and taking a good look at all the components uncovered during the process -- probably time to check the valves, just for the peace of mind if nothing else.
And order a RAMAir kit if you don't already have that installed, and save some of the work putting it back together.
Just two cents -- I also see the approach of 'ride it like you stole it' until you are convinced in your own mind more is needed.