I went from a CB350 to a CB750 in 1971. I used to drive the 350 from San Fran to San Diego and back on a 2 day weekend....and be back Monday morning for muster. I could hardly get off the bike, I would be so numb, stiff and sore and as you know...the 350 vibrated a lot.
Glad you enjoyed the Norton post. I try to post stuff if I see something nice. There's so many classic bikes out there that I wish I could have. Brings back memories.