Hey, i'm 61, and like you have been riding all my life. I am selling my 2003 Honda VTX1800R because it's just too heavy to hold up any more! I went from over 800 lbs to a 2011 Kawasaki Ninja 1000 with only 2100 miles on it! It only weighs in at 510 lbs. I had to learn to ride like a hooligan again! This bike actually turns! I freakin love it.
The best mods us older folks can do to this bike is... NUMBER 1. Murphs handlebar risers, https://www.murphskits.com/product_i...roducts_id=501
This one Mod turned an uncomfortable, lean too far forward, hurts my wrists stance into something I could ride for 100's of miles. NUMBER 2. National cycle V stream windscreen. OEM part# N20107. you can buy this on Amazon $134.79. It looks stupid, it looks like the Popes hat! Of all the wind screens you can get for this bike, only one protects you from the elements the best. I personally hate to be cold, and I live in Colorado. NUMBER 3. I own a 2011, it comes stock with a 190/50 rear tire. It really sucks so bad you can hear it in the next room! The front end feels like a wet sponge trying to go around a corner. Going to a 190/55 rear tire fixes all of the front end problems and returns the bike to neutral steering. I think Kawasaki fixed this by putting the 190/55 now stock on newer bikes. NUMBER 4. Sargent seat. Your ass, and legs will thank you again, and again after you switch, and it's cut a little narrower to let your heart actually pump blood to your legs,without pooling in your cramped thighs. If you are short like me, 29" inseam, you can install a lowering link to your rear suspension to lower your bike 2-4" to be more flat footed. Lower it too low and you will have to get an adjustable kick stand.
These mods made the most enjoyable difference to this bike and I would never ride it stock. I also have lowered 3" (with the 190/55 you don't need to lower your kick stand), frame sliders, Givi luggage hard bags, brighter bulbs in all places, rear axel spools, K&N air filter, billet alumium brake fluid reservoirs, red stripe on both wheel rims, and a cool tank protector sticker that matches the paint.
I hope this helps,