BMW R90S
The BMW R90S is a 900cc sport motorcycle produced by BMW from 1973 to 1976. BMW commissioned designer Hans Muth to oversee the R90S, which became the flagship of the boxer engined "/6" range. Sporting distinctive two-tone paintwork, a bikini fairing and a new tail, the R90S was intended to shrug off the enduring image of BMW bikes as staid and utilitarian. The R90S had a top speed of , it ran the quarter mile in around 13.5 seconds and it accelerated from in 4.8 seconds. Maximum torque was delivered at 5,500 rpm and the engine redlined at 7,200 rpm. Technical overview The R90S' type 247 "airhead" engine was a pushrod OHV, two valve per cylinder, air-cooled flat-twin "boxer" unit. The engine was based closely on the R75/5, sharing the same stroke, but with a larger bore, to give a capacity of 898cc. The R90S weighed and has a five-speed gearbox with a shaft final drive. The first R90S models had a two-tone paintwork scheme of "Smoke Black/S ...
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