Hi, Doug! Riding whips me, too. I'm 49 and don't get as much riding practice as I'd like. More than an hour or so starts to tire me. The Advil idea does help. Take a couple an hour before you start. Controls the aches and pains.
I don't know how your bike is set up, but I had to make 4 specific adjustments to mine to make it comfortable enough to ride longer. You may need to consider some of these.
Helibars - so that I could get the bars up and back enough for a comfortable upright riding position.
Longer cables and lines - to give full position flexibility to the Helibars.
Aftermarket seat - because the stock seat is a cruel joke. A Sargent re-work was better...a Suzuki gel seat was best (for me). There is also Corbin seats that some swear by. My butt used to be on fire after an hour of riding. I've more than tripled that with the gel seat.
Rear shock - I can't quite put my finger on why, but the ride with a more advanced shock is much more like floating, rather than being pounded.
These changes aren't cheap. Seems to me a person shouldn't have to make them. I'm convinced Suzuki has an agreement with or holds stock in some aftermarket accessory makers and that's why the ride when stock is like cr@p!
If I'd had to keep the Bandit's stock riding position, I would have sold the bike long ago. Actually, I tried on eBay a few months after I got the bike and before my modifications because I just couldn't stand to ride it.
Still not as comfortable as my '78 GS750E was, but, hey! Those days are gone. Besides, I was 20 then and indestructible. Maybe the ride really sucked and I didn't know it!