Short Description
The GSX-R400 (initially called GSX-R in Japan, internal model code GK71B) was released in March 1984. It was the first mass-produced light-weight racer replica with an aluminum cradle frame and a liquid-cooled inline-four DOHC engine with four valves per cylinder. The, in those days, amazing machine was based on Yoshimura’s TT-F3 racer GS1000R. The competitors, Yamaha FZ400R and Honda CBR400R were 13—31 kg (29—68 lbs) heavier than the new and quick GSX-R
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The GSX-R400F (GSX-R Type 2) was released in March 1985. The maximum power and torque of the engine remained the same but the power output was improved at the middle-range revs by changing the carburetor settings. A simple fuel meter was added to the model, the remaining amount of fuel was indicated by the right side combination meter when the power switched in OFF position. Some improvements were made to the electric system. 1985 was the year the famous GSX-R750 was launched and caused a sensation with its appearance, power and light weight. The 750 cc version had even better power/weight ratio than its little brother and was much faster but not that different from the original, GSX-R400. It was fairly unknown in the time in the Western world but the GSX-R750 became instantly known as the sensational new racer replica from Japan. The fact that the GSX-R400 was released a year earlier is still unknown to many motorcycle enthusiasts outside Japan.
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