Suzuki GSX-R 400R 
| Make Model | Suzuki GSX-R 400R | | Year | 1991 | | Engine | Liquid cooled, four stroke, transverse four cylinder, DOHC 4 valves per cylinder. | | Capacity | 398 | | Bore x Stroke | 56 х 40 4 mm | | Compression Ratio | 12.0:1 | | Induction | 4X 33mm carbs | | Ignition / Starting | CDI / electric | | Max Power | 59 hp @ 12.500 rpm | | Max Torque | 4.0 kg-m @ 10000 rpm | | Transmission / Drive | 6 Speed / chain | | Front Suspension | 41mm UD Telescopic spring preload adjustment | | Rear Suspension | Rising-rate monoshock 7-way spring preload 4-way rebound preload | | Front Brakes | 2x disc 4 piston calipers | | Rear Brakes | Single disc | | Front Tyre | 120/60R17 | | Rear Tyre | 15O/60R17 | | Dry-Weight | 167 kg | | Fuel Capacity | 44 mpg | | Consumption average | 12.7 sec | | Top Speed | 120.4 mph | 
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.
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