Winter is coming

In addition to lightweight, a tuned engine and minimalist bodywork, the café racer typically features distinctive ergonomics. Dropped bars that are low, narrow handlebars called clip-ons – enabled the rider to "tuck in", reducing wind resistance and improving control. Along with the rearward located seat, the posture often required rearsets, or rear-set footrests and foot controls, again typical of racing motorcycles of the era. 

Triumph Bonneville

Distinctive half or full race-style fairings were sometimes mounted to the forks or frame.
The bikes featured minimalist styling, engines tuned for maximum speed and light road handling. A well-known example was "The Triton", a homemade combination of the Norton Featherbed frame and a Triumph Bonneville engine. It used a common and fast racing engine combined with a well-handling frame, the Featherbed frame by Norton Motorcycles. 

Another hybrid was the "Tribsa" which had a Triumph engine in a BSA frame. Other combinations such as the "Norvin" (a Vincent V-Twin engine in a Featherbed frame) and racing frames by Rickman or Seeley were also adopted for road use.