Classic, well I guess. Rare? one of a bazzillion. During certain years Honda America sold 3 million units. There are still going to be parts out there for your still low mileage bike. 5 k miles is just break in, hopefully it was flogged a bit to make sure it holds up, seated the rings well. Maybe do some more flogging just to make sure.
After that, see about the synthetic oil best engineered for the right specs and who knows. One post said the primary chain gets sloppy and starts sawing on the case at 50-60k. Some say ride past that mile marker If things re okay. Maybe not as much longivity without synthetic oil which was invented, or marketed 20 years later, and not available for those hi-mi bikes when they got their miles. I hear wonder stories of high mileage vehicles with that stuff.
Race your hyabusa buddy to 100k miles, is what I'd say. Bet him $5 bucks. His will be in the corn field 3-4 years by the time yours turns 100k.