The Ninja ZX-RR is a race bike from Kawasaki, which raced in the MotoGP world championship. The bike made its debut towards the end of the 2002 MotoGP season with riders Australia's Andrew Pitt and Japan's Akira Yanagawa.
The ZX-RR struggled in 2008, with the best results being two fifth-place finishes from John Hopkins in Portugal and Anthony West in Brno. Hopkins and West blamed both a lack of feeling in the front end and rear traction on corner exit. Previous ZX-RRs have been difficult to ride, but beyond the limited statements by the riders it is unclear what the problems with the 2008 bike were.
At the end of the 2008 season, Kawasaki announced its retirement from the MotoGP world championship. However, Forward Racing decided to take over a ZX-RR which Marco Melandri would drive in the 2009 season. He managed to score the fourth and last second place for Kawasaki. At the end of the season however, Forward Racing withdrew from MotoGP and Melandri moved to the Superbike World Championship.