| MODEL | KAWASAKI NINJA 400 2023 |
| Year | 2023 |
| Engine Type | Four stroke, parallel twin, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 399 cc / 24.3 cu in |
| Bore X Stroke | 70 x 51.8 mm |
| Compression Ratio | 11.5:1 |
| Cooling System | Liquid cooled |
| Max Power | 33.4 kW / 45 hp @ 10000 rpm |
| Max Torque | 37 Nm / 27.3 lb-ft @ 8000 rpm |
| Ignition | TCBI with digital advance |
| Induction | DFI with 32 mm x 2 throttle bodies |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Forced lubrication, wet sump |
| Gear Box | 6-speed |
| Clutch | Wet multi-disc, manual |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Trellis, high-tensile steel |
| Front Suspension | 41 mm telescopic fork, 120 mm / 4.7 in travel |
| Rear Suspension | Bottom-Link Uni-Trak, gas-charged shock with adjustable preload, 130 mm / 5.1 in travel |
| Front Brakes | Single 310 mm semi-floating petal disc, single balanced actuation dual-piston caliper |
| Rear Brakes | Single 220 mm petal disc, dual-piston caliper |
| DIMENSION SPECS | |
| Overall Length | 1990 mm / 78.3 in |
| Overall Width | 710 mm / 27.9 in |
| Overall Height | 1120 mm / 44.0 in |
| Seat Height | 785 mm / 30.9 in |
| Wheelbase | 1370 mm / 53.9 in |
| Ground Clearance | 140 mm / 5.5 in |
| Dry Weight | — |
| Wet Weight | 168 kg / 370.3 lb |
| WHEEL SPECS | |
| Front Tyre | 110/70R17 M/C 54H |
| Rear Tyre | 150/60R17 M/C 66H |
| FUEL SYSTEM | |
| Fuel Capacity | 14 litres / 3.7 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 2023 Ninja 400 has facelifted Ninja styling inspired by the H2, twin LED headlamps and a trellis frame similar to the H2's. It keeps the 399 cc parallel twin, now Euro 5 compliant, with a 310 mm front disc that the page calls the largest in its class. ABS, an assist and slipper clutch and a relaxed riding position complete the package, and the page presents it alongside the Z400 naked.
