They were indeed, but what useful purpose do they serve now ? Apart from allowing old farts like me to hark back to the good old days.
The price people will pay for them is crazy.
People are paying 15 grand for a 900 Z1, which were a great bike in 1975, but a well used 2 grand 600 sportsbike will leave one for dead using only 2nd, 3rd, and maybe 4th gears.
They also had rubber frames and wooden brakes, but it doesn't matter, because it allows us to relive our youth.
Incidentally, I really wanted a Fizzy, but my Dad bought me a Casal instead, because his mate owned the franchise or something.
It was a complete pile of crap. Two speed gearchange on the handlebars and did 38mph flat out, on a good day.
I rode it for about a month and then just left it lying up the garden to rot. Reverting to borrowing a mates Dunstall Commando, until I got caught.
Dad had to have (another) day of work to go to court with me. He was not happy.