| MODEL | KAWASAKI ZX-400 1985 |
| Year | 1985 |
| Engine Type | Four stroke, liquid cooled, DOHC, transverse four cylinder, 4 valves per cylinder |
| Displacement / Capacity | 399 cc / 24.3 cu in |
| Bore X Stroke | 57 x 39 mm |
| Compression Ratio | 11.5:1 |
| Cooling System | Liquid cooled |
| Max Power | 59 hp / 44 kW @ 12000 rpm |
| Max Torque | 3.6 kgf-m / 35.3 Nm / 26.0 lb-ft @ 10500 rpm |
| Ignition | CDI |
| Induction | 4 x Keihin CVKD30 carburettors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6-speed (1st 2.571, 2nd 1.777, 3rd 1.380, 4th 1.125, 5th 0.961, 6th 0.851) |
| Clutch | Wet multi-disc |
| Final Drive | Chain, secondary reduction 2.933 (44/15), total 6th gear 7.154 |
| CHASSIS SPECS | |
| Frame | Aluminium diamond tubular, double cradle |
| Front Suspension | 41 mm telescopic forks |
| Rear Suspension | Rising rate monoshock |
| Front Brakes | 2 x 300 mm discs, 4-piston calipers |
| Rear Brakes | Single 240 mm disc, 1-piston caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 770 mm / 30.3 in |
| Wheelbase | 1395 mm / 54.9 in |
| Ground Clearance | — |
| Dry Weight | 176 kg / 388 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 100/90-16 |
| Rear Tyre | 130/90-16 |
| FUEL SYSTEM | |
| Fuel Capacity | 16 litres / 4.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 1985 ZX-400, sold in Kawasaki's listing as the GPz400R, is a 399 cc sports bike with a liquid-cooled DOHC transverse four. It has four carburettors, a six-speed gearbox and a rising-rate monoshock rear end. The page gives a 1395 mm wheelbase and a 770 mm seat height, and the bike is a clear example of the mid-1980s 400 cc sports class.
