Just for thought though, consider that that is very relative to where you were living in back then.
A big bike like all those brit bikes that blue collar broke undesirables were riding in the UK were a rich man’s bike in Portugal and Spain, and maybe Italy too. Here if you were riding a 500 or 600 Triumph before 1974 that meant you were either a person with plenty of disposable income or had rich parents, usually older gentlemen or rich kids.
Brokies used to ride 50cc national made bikes, now that was properly dire! I don’t think they were undesirables though, just broke.