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Suzuki GSXR400 Gallery

The GSX-R400 (initially called GSX-R in Japan, internal model code GK71B) was released in March 1984. It was the first mass-produced lightweight 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.

Compared to other bikes of the time, the GSX-R400 was very light and the 4-piston brakes at the front and the 2-piston rear brake was more than adequate for the 152 kg (334 lbs) light racer. The bike was quick to handle, the engine with 4-1 exhaust system was powerful for its size and made the GSX-R the fastest bike in its class. With the maximum power output 59 hp and 152 kg (334 lbs) dry mass, the power/weight ratio (2,57 kg/hp) was even better than Suzuki's incredible 2-stroke racer, RG250 Gamma. The GSX-R400 started a new era, it was the fastest and best-handling 400cc bike ever made.

The water-cooled inline-four four-stroke had double overhead camshafts and four valves per cylinder. The GSX400FW (presented the previous year) had the same principal engine specs but lower power output and the GSX-R400's new engine with its 66 kg (145 lbs) was 10 kg (22 lbs) lighter. 12,000 maximum revs.

Bike Image Description
1984 Suzuki GSX-R 400 Suzuki GSX-R 400
  • Liquid cooled, four stroke, transverse four cylinder, DOHC 4 valves per cylinder
  • 59bhp @ 11,000rpm
  • 6 speed
  • Disc brakes
  • 152kg
1986 Suzuki GSX-R 400 1986 Suzuki GSXR400  
1986 Suzuki GSXR400 1986 Suzuki GSXR 400  
1986 Suzuki GSX-R 400 1986 Suzuki GSX-R 400  
1986 Suzuki GSX-R400 SP Suzuki GSX-R400 SP  
1987 Suzuki GSXR 400 1987 Suzuki GSX-R400  
1987 Suzuki GSX-R 400 Suzuki GSX-R400  
1988 Suzuki GSXR 400 Suzuki GSXR 400 Model GK71F
1988 Suzuki GSXR 400 SP 1988 Suzuki GSXR 400 SP  
1989 Suzuki GSXR400 1989 Suzuki GSXR400  
1989 Suzuki GSXR400 SP Suzuki GSXR400  
1990 Suzuki GSX-R 400R Suzuki GSX-R 400R

In 1990 Suzuki presented a whole new GSX-R400 (new internal model code GK76A) with inverted forks and many other modifications. The frame was upgraded from twin spur to double cradle, similar to the 1988 GSX-R750 model change. A new 4 into 1 exhaust increased the engine power close to 60bhp and the engine redlined at 14,500 rpm. Nissin 4-cylinder front brake calipers, new fairing design with faired-in headlights, preload-adjustable forks, unbraced swing-arm, rear hugger mudguard.

  • Liquid cooled, four stroke, transverse four cylinder, DOHC 4 valves per cylinder
  • 59bhp @ 12,500 rpm
  • 6 speed
  • Disc brakes
  • 167kg
  • 44mpg
  • 120mph
1990 Suzuki GSX-R 400R-SP Suzuki GSX-R 400R-SP The GSX-R400 got a new frame (GK73A) and new overall appearance in 1988. The new model was presented in February 1988. The redesigned GSX-R got once again new fairing and shorter wheelbase, but the weight increased a bit due to the stronger new chassis and exhaust system. The model also got slingshot carburetors, polished chrome silencers, curved radiator, Tokico 4-cylinder front brake calipers and a rear hugger mudguard.
1991 Suzuki GSX-R 400R-SPII Suzuki GSX-R 400R-SPII The 400cc series were increasing popularity in Japan and a production racer with different suspension and gearing, GSX-R400 SP (Sports Production) was presented for 1988. It looked almost identical with the standard GSX-R400 but didn't have passenger foot pegs and you could spot the rear suspension gas reservoir peeking out from under the seat. Also the front suspension was different from the standard model. The SP version also had a Sports Production logo on the tailpiece.

To compete in production racing, the manufacturers produce SP (Sports Production) versions of their sports bikes. These usually have fully adjustable suspension, close ratio gearboxes and a single seat but didn't have more power, due to Japanese motorcycle manufacturer's power restriction code.

1992 Suzuki GSX-R 400R-SPII Suzuki GSX-R 400R-SPII  
1994 Suzuki GSX-R400R Suzuki GSX-R400R The 400 is pure concentrated GSX-R: everything you love about the 750, now in a smaller, more extreme package. It's got the double-cradle frame, the distinctive looks and it makes the 750 feel like an aircraft carrier.

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