| MODEL | KAWASAKI ZR-X 400-II 2004 - 2007 |
| Year | 2004 - 2007 |
| Engine Type | Four stroke parallel twin cylinder, DOHC, 2 valves per cylinder |
| Displacement / Capacity | 399 cc / 24.4 cu in |
| Bore X Stroke | 57.5 x 38.5 mm |
| Compression Ratio | 11.2:1 |
| Cooling System | Liquid cooled |
| Max Power | 53 hp / 39.5 kW @ 11500 rpm |
| Max Torque | 37 Nm / 27.3 lb-ft @ 9000 rpm |
| Ignition | Transistor |
| Induction | 4x Keihin CVK30 carburetors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | Wet multi disc |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | 39 mm RWU telescopic forks |
| Rear Suspension | Dual shocks, preload adjustment |
| Front Brakes | 2x 298 mm discs, 6-piston calipers |
| Rear Brakes | Single 240 mm disc, 2-piston caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 780 mm / 30.7 in |
| Wheelbase | 1450 mm / 57.1 in |
| Ground Clearance | 120 mm / 4.7 in |
| Dry Weight | 186 kg / 410.1 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 110/80-17 |
| Rear Tyre | 150/70-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 16 Litres / 4.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
A mid-2000s ZR-X 400-II sports-naked with 53 hp, transistor ignition and a high-revving engine that needs about 10,000 rpm before it makes real power. The page's review describes it as small, light and quick-revving, with firm suspension that suits smooth roads. Its text also mentions a 140 mph-plus top speed that is not in the spec table.
