c1972 Honda CB750/4 K2 Motorcycle
Often referred to as the world's first superbike, the 1969 introduction of the Honda CB750 is significant amongst bike enthusiasts. It brought a transverse, OHC four-cylinder motor to the masses and is seen as paving the way for several other superbikes based on this configuration. It also introduced a front disc braking system. As with many vehicles of the era, Honda created this bike in response to American dealer demand who wanted a larger sports bike to sell alongside their successful smaller-capacity runabouts. Along with being technologically advanced its on-sale price significantly undercut British bikes of similar performance and really set the Honda bike juggernaut in motion with its 750cc, 50kw motor and five-speed transmission. Iterations of the original CB750 continued through several decades, with a DOHC variant of the motor introduced in 1979 before the nameplate was discontinued in 2003, though it returned for a brief fling in 2007.