The Honda CBR400 is a Japanese domestic market small-capacity sport motorcycle, part of the CBR series introduced by Honda in 1983. It is the first Honda motorcycle to wear a CBR badge. The CBR400R (NC17 ) naked bike was launched in December 1983. The 4-valves per cylinder, air-cooled, four-stroke, DOHC, inline-four engine had a rotational-speed valve stop mechanism "REV" (a prototype of Honda's VTEC system) that changed from two valves into four valves at 9,500 rpm. The following two years, it came as semi- and fully faired version as the F3 Endurance. The CBR400R and early CBR400RR models both carry the model number NC23, which makes up the first part of these bikes' frame numbers. In 1986 the CBR400R was also known as Aero, Jellymould, as it shares its major design features with the res