well, as with all hype, its not quite as slick as it sounds. the old cb900custom, for that is the bike that had the sticker on it actually had a 5 speed gearbox like most bikes of the era. but it had a choice of high or low ratio box, so its not like you could select 1,2,3,4,5,6,7,8,9,10, you could have low box 1,2,3,4,5. or high box 1,2,3,4,5. and iirc you couldnt shift from high to low box on the move. this was all about the yanks obsession with 1/4 mile times and traffic light gp's, in reality, most got left in high box, cos its not like cb900's were slow to begin with. i remember that hondas off road 3 wheelers sold as 'atc's' at the time had a similar split ratio box. just another gimmic to draw in the gullable and easily impressed.
however, from the same era, and i never saw another, cabe the cb750 turbo, i remember seeing one in west coast salvage at southport, it was a genuine honda model judging by its appearance, and seemed to be a twin cam cb750 motor fitted with a turbo, iirc it predated the old cx turbo by a few years. i only ever saw that one and have never seen mention of them since!
