On vintage bikes :
Back when I had the second sportster , I went to a CMA meeting and there was a feller there on an old BSA 650 (1965 ??) it was fully restored looking and nice to look at . We were going the same way home after the meeting so we rode along together for about 1/2 way when he motioned to pull over.
He had been listening to the Sportster and wanted to ride it , so we traded bikes the last 25 miles to his house.
First thing ... the shifter was on the wrong side !

and the brake was too !
I only got them mixed up one time with a down shift instead of a rear brake.
The power level remined me of the old CB350 twin I had years ago , but the vibration reminded me of a China 200cc Roketa I got rid of as soon as possible.
Them old machines might have been "GREAT !" in their day , but compared to what we have now ... they are not so great anymore.
In 1974 I was ridding my fairly new Yamaha SX650 to my duty station in TX , but had gone by way of Florida to meet some friends. Between Florida and South TX I rode along side a feller on a Triumph 650 Tiger. (single carb-twin) . That bike used 1/3rd less fuel than my Yamaha and could pull away from my SX650 in high gear any time he wanted too. No the SX wasn't in need of anything ... it ran great - the Tiger was just better.