|related = [[BMW
With the introduction of the '/6' range in 1973, [[BMW|BMW]] joined the [[superbike]] league with a pair of 900cc flat-twins. The touring version was typed '[[BMW R90/6|BMW R90/6]]' and the gorgeous new sportster 'R90S'. With its twin front disc brakes, racing-style seat, megaphone-shaped silencers and cockpit fairing, the R90S looked like no BMW before it, and the air-brushed 'smoke' custom finish to tank, seat and fairing meant that no two examples left the factory exactly alike. With 67bhp on tap, the R90S was good for a maximum speed of more than 125mph. True, there were a handful of rivals that were faster, but none of them could match the BMW's capacity for sustained high-speed cruising. 'When it comes to comfort and capability for
travelling at maximum speed with minimum fatigue, the R90S is second to none,' reckoned Bike magazine's tester back in 1975, going on to conclude: 'The truth is that many bikes do one thing superbly, but the BMW is the only bike I know that does everything very well.'