The engine was based on the ones of the supersports model, GSX-R750, which had very small friction loss. It was a water-cooled 4-cylinder DOHC 4-valve engine with an improved cam profile and intake/exhaust system.
Unlike the conventional 125cc minibikes, this model had a full-sized chassis to make tall riders drive in a comfortable position even when they took a crouching posture.
The superb maneuverability of this ultra-light bike drove out other motorcycles with large engine capacity. This bike had indicated the potential capacity of the contemporary liter supersports model in this period. The extraordinarily light body was developed based on the 750 model.
This model was based on the CB-1. It had a semi-raised type handlebar and a newly designed seat. The tank capacity had been increased from 11L to 13L, and it had a high gearing ratio.
A street sports model that mounted a CBR type straight 4 engine. It had improved its quality of texture, by having a hairline finished side cover and a triple layer painted fuel tank.
It made its debut as the Japanese specification model of the XT600/E which was the best-seller model in the overseas market. It underwent body color change, adopted aluminum rim, changed its suspension setting in 1992.
While keeping the concept of the ZZ-R1100, which was the top model of the series, it established a GT machine category in the 400 class. The new ALCROSS frame mounted a new engine to pursue its comfort.
An emblem "X (kai)" had been added to its side cover. The new engine was changed to 4-valve style. It had improved its response by having K-TRIC, and focused on the mid-low speed range.