Rocco
What it really needs to run long distances is more comfort, less tiring for the rider, and very high reliability. More power is not the first requirement.
So...
--very reliable tires, maybe better handling than the stock IRC, in stock size (I have Pirelli MT66 Route tires going on later this week).
--Windshield or fairing that comes up just below your eyes (I have a National Cycle Plexifairing GT that needs to be cut down 2").
--Full protective leather outfit including boots & gloves, or armored fabric gear.
--Better seat.
--Minor position adjustments to fit you better.
--Minimize the noise level to minimize rider fatigue.
--Read ALL of David L. Hough's books and practice what he says to practice so the maneuvers you'll need for an emergency are your everyday actions, just done more quickly.
--A K&N air filter likely makes no difference except maybe when just cleaned and at wide open throttle. I think K&N is more hype than performance.
--For a bit more power get a SuperTrapp #728-50650 muffler with the minimum number of discs installed for more low-end power and least noise.
Video & sound. $300 at Dennis Kirk.
--Re-jet the carburetor as needed for the equipment you have.
--Lancer's cam upgrade sounds like a good thing, but not before the seat, windshield, and position adjustments.
--If you'll run more than 100 miles between stops, more gas (and you won't run that far on the stock seat...
)
Keep in mind that tired people make mistakes. Tired motorcycle riders make mistakes that hurt.
There is a difference between top end power and usable power. Low end and mid range power is what you'll use all the time. Top end power is used very seldom, just at max rpms and wide open throttle. Yes, fun, but not that useful. Even a racer benefits from the mid range power to get away first from the start line or to pull ahead exiting the corner. You'll need the mid range power when passing a car.