Yeah, it's definitely time for you to do some swapping of these wear parts. I bet the FPR and fuel filter will fix this. If not, spark plugs could definitely do it if you haven't ever changed them. IMO, spending a few hundred dollars on replacement parts is a good idea for high mileage VXes.
Did you find the thread about how to change the fuel filter? It's pretty easy just a little messy and your garage will stink like gas for a day...
Bart