The Kawasaki ZXR400 is a sport bike introduced by Kawasaki in 1989. It was one of the most popular of the 400 cubic centimetres (24 cu in) sport bikes that swept across Japan and later Europe in the 1990s. It was discontinued in 1999 in worldwide markets but unsold models were imported to the United Kingdom until 2003  The H model was produced first, and was superseded by the L series in 1991. The L series had increased power output, but less torque, and updated slimmer rear styling. An earlier model called the ZX-4 was released as a Japan only model from 1987-1988.