To the modelyear 1981 follows the BMW R 100 CS the R 100 S with the powerful 70 hp engine and a sporty cockpit fairing. The classic line and subtle paintwork mainly appealed to traditionalists among BMW riders and generated good sales figures. The striking feature of the CS was undoubtedly the fact that the marginally lower weight for the same output made this motorcycle the fastest motorcycle of its time in the BMW range. It achieved a top speed of 200 km/h.