The '' Kawasaki ZRX 400 '' road bike was introduced in February 1994 as a successor to the [[Kawasaki_Xanthus_400 | Kawasaki Xanthus 400]] and in addition to the Zephyr 400, which became a Japanese bestseller. The ZRX400, like most other models with a 400 cc engine, was only sold in the Japanese market.

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Unlike the Zephyr, the Kawasaki ZRX400 has a liquid-cooled engine (from [[Kawasaki_ZZR400 | Kawasaki ZZ-R400]]) and a rectangular headlight with a small half fairing. In 1995, the Kawasaki ZRX400-II modification appeared, which received more familiar classic features - in particular, a round multi-reflector headlight.