It was a drag bike which loaded the former CB1000SF-based straight 4 engine that was enlarged to 1284cc. It had a Φ 43 front fork and a rear dish wheel on its square cross-section mono-backbone frame.
YAMAHA had exclusively designed an engine with an axis structure that sterically assembled a crankshaft, a clutch and a transmission. With its Φ 41 inverted fork, piggyback monoshock, and its long swing arm, it demonstrated an excellent turning power, tracing the road surface with a deep stroke.
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.
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