| MODEL | SUZUKI GSX-R 400R 1989 - 1990 |
| Year | 1989 - 1990 |
| Engine Type | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 398 cc / 24.3 cu in |
| Bore X Stroke | 56 x 40.4 mm |
| Compression Ratio | 11.8:1 |
| Cooling System | Liquid cooled |
| Max Power | 44 kW / 59 hp @ 11000 rpm |
| Max Torque | 39.2 Nm / 4.0 kgf-m / 28.9 lb-ft @ 9000 rpm |
| Ignition | CDI |
| Induction | Slingshot carburetors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 6 speed, constant mesh |
| Clutch | Wet multi-plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Aluminium angular pipe double cradle |
| Front Suspension | Telescopic forks |
| Rear Suspension | Full floater swing arm, non-adjustable |
| Front Brakes | 2 x discs, 4 piston calipers |
| Rear Brakes | Single disc, 2 piston caliper |
| DIMENSION SPECS | |
| Overall Length | 1995 mm / 78.5 in |
| Overall Width | 695 mm / 27.4 in |
| Overall Height | 1110 mm / 43.7 in |
| Seat Height | 735 mm / 28.9 in |
| Wheelbase | 1375 mm / 54.1 in |
| Ground Clearance | 125 mm / 4.9 in |
| Dry Weight | 160 kg / 352 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 110/70-R17 53H |
| Rear Tyre | 140/60-R18 64H |
| FUEL SYSTEM | |
| Fuel Capacity | 15 Litres / 3.96 US gal / 3.3 Imp gal |
| Fuel Consumption | — |
| Top Speed | — |
In 1989 the name gained an extra 'R' to become the GSX-R400R, while the 1988 frame and 59 hp four-cylinder engine carried over. It sat alongside the single-seat SP production racer launched in June 1989.
