 | |
| Manufacturer | Kawasaki Motorcycle & Engine Company |
|---|---|
| Also called | ZX-4RR |
| Parent company | Kawasaki Heavy Industries |
| Production | 2023– |
| Predecessor | ZXR400 |
| Class | Sportbike |
| Engine | 399 cc (24.3 cu in) liquid-cooled 4-stroke 16-valve DOHC inline-four |
| Bore / stroke | 57 mm × 39.1 mm (2.2 in × 1.5 in) |
| Compression ratio | 12,3:1 |
| Top speed | 235 km/h (146 mph) |
| Power | 56.7 kW (76.0 hp) @ 14500 rpm |
| Torque | 37.6 N⋅m (27.7 lbf⋅ft) @ 12500 rpm |
| Transmission | Six-speed, chain drive |
| Frame type | Steel diamond with truss structure |
| Suspension | Front: telescopic fork |
| Brakes | Front: Four-piston caliper with double 290 mm (11.4 in) disc Rear: Single-piston caliper with single 220 mm (8.7 in) disc |
| Tires | Front: 120/70–17 (tubeless) Rear: 160/60–17 (tubeless) |
| Wheelbase | 1380 mm |
| Weight | 188 kg (414 lb) (wet) |
| Fuel capacity | 15 L (3.3 imp gal; 4.0 US gal) |
| Related | Kawasaki Ninja ZX-25R |
The Kawasaki Ninja ZX-4R is a 399 cc sports bike introduced by Japanese motorcycle manufacturer Kawasaki in 2023.