| MODEL | KAWASAKI GPX 400R 1991 - 1995 |
| Year | 1991 - 1995 |
| Engine Type | Four stroke, parallel twin cylinders, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 398 cc / 24.3 cu in |
| Bore X Stroke | 70 x 51.8 mm |
| Compression Ratio | 10.7:1 |
| Cooling System | Liquid cooled |
| Max Power | 50 hp / 36.5 kW @ 10500 rpm |
| Max Torque | 3.6 kgf-m @ 9000 rpm |
| Ignition | TCI (Transistor Controlled Ignition) |
| Induction | Carburetor |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 6 speed |
| Clutch | Wet, multiple discs, cable operated |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Iron, double cradle frame |
| Front Suspension | 38mm telescopic forks, 130 mm / 5.1 in travel |
| Rear Suspension | Swinging arm, single shock adjustable for spring preload, 100 mm / 3.9 in travel |
| Front Brakes | Single disc |
| Rear Brakes | Single disc |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 177 kg / 390 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 110/70-17 |
| Rear Tyre | 130/70-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 16 Litres / 3.9 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 1991 - 1995 GPX 400R, also listed as the EX 400R, carried on the 398 cc Ninja-family twin with DOHC and carburetors. Its engine, frame and suspension were close to the 1987 - 1990 bike, and the main visible difference on the page is a single front disc. It was the mid-size sport option between Kawasaki's 250 and 500 cc models in the early 1990s.
