Yep, I think you already diagnosed it.
Next, I like Jim's idea best- buy one bulb and see if that works. Then again, buy two bulbs and they can sit on the shelf if you don't need them- they won't go bad like lettuce does :-) Of course if you are really, really serious about avoiding purchasing a bulb(s), you could always go to a Concours (or FJR or any one of dozens of other bikes- H4 headlights are really quite common) gathering and
steal borrow a couple of headlight bulbs from the bikes in the parking lot. It would be best to wait until very late at night and wear dark clothes but if you just cannot stay up late, just get near the bike you want to
steal borrow the bulbs from, point away and scream "Hey, is that ELVIS?" and grab the bulb(s) while everyone looks for Elvis.....
It is possible that it is something else but not likely IMO or experience. Headlight bulbs on motorcycles don't have the longest possible lifespan, even on modern bikes that don't vibrate as much as older bikes tended to do.
Brian
So the high beams are not working. Fuse is good. High beam indicator still lights up. I read in some other posts that it is possible for the lights to have BOTH burned out at the same time or that I didnt notice that one had burned out until both did. As a final test before buying new bulbs, how about swapping the identical low and high beam relays to eliminate them?