| Category | Specification |
|---|---|
| Engine Type | 399 cc, liquid-cooled, 4‑stroke, DOHC, 16‑valve inline‑four |
| Displacement | 399 cc |
| Max Power | 77 PS (57 kW) @ 14,500 rpm; 80 PS with ram air |
| Max Torque | 39 Nm @ 13,000 rpm |
| Bore × Stroke | 57 × 39.1 mm |
| Compression Ratio | 12.3 : 1 |
| Starting System | Electric self-start |
| Fuel System | Multipoint EFI with 34 mm throttle bodies + ram-air |
| Transmission | 6‑speed manual, chain drive |
| Clutch | Wet multi-disc |
| Frame | Trellis high-tensile steel |
| Front Suspension | 37 mm Showa SFF‑BP inverted fork (preload adjustable on SE/RR) |
| Rear Suspension | Horizontal back-link shock; RR = Showa BFRC-lite (adjustable) |
| Front Brake | Dual 290 mm petal discs, radial-mount 4-pot calipers, ABS |
| Rear Brake | 220 mm disc with ABS |
| Front Tyre | 120/70‑17 tubeless |
| Rear Tyre | 160/60‑17 tubeless |
| Wheelbase | 1,380 mm |
| Seat Height | 800 mm |
| Ground Clearance | 135 mm |
| Dry/Wet Weight | 188–189 kg |
| Fuel Tank Capacity | 15 L |
| Electronics & Features | 4.3″ TFT, smartphone Bluetooth, 4 ride modes, KTRC, KQS (dual-direction on SE/RR) |
| Lighting | All LED |
The Kawasaki Ninja ZX‑4RR (2025) is a groundbreaking sub-400 cc supersport, powered by a high-revving inline-four engine delivering 77 PS (80 PS with ram-air) and 39 Nm torque. Mated to a 6‑speed gearbox, electric start, and EFI with ram-air, it strikes exceptional performance. Its lightweight trellis chassis, 37 mm Showa SFF‑BP forks, and race-grade BFRC-lite rear shock (RR) deliver razor-sharp handling. Braking is managed by dual 290 mm discs with ABS. The bike also includes a Smart TFT display, ride modes, traction control, and optional quick-shifter on SE/RR models. With aggressive styling and high-spec features, the ZX‑4RR sets a new standard in the 400cc class.