Various events contrived to bring about the cafe racer era, together with the advent of the rocker - and subsequently mod - cults. New motorcycles such as the BSA Gold Star singles and star twins, Norton Dominator, Royal Enfield Meteor and Constellation, Triumph Tiger 110 and Thunderbird and Velocette Venom created a new breed of enthusiast.
Films such as Marlon Brando's The Wild One expressed, albeit in somewhat extreme form, the biker-as-rebel philosophy. Add to this the potency of that biggest of all pop music phenomena, rock'n'roll, and the ingredients were all in place.
