| MODEL | SUZUKI GS 400E 1978 |
| Year | 1978 |
| Engine Type | Four stroke, parallel twin cylinders, DOHC, 2 valves per cylinder |
| Displacement / Capacity | 398 cc / 24.2 cu in |
| Bore X Stroke | 65 x 60 mm |
| Compression Ratio | 9:1 |
| Cooling System | Air cooled |
| Max Power | 25.4 kW / 34 hp @ 8000 rpm |
| Max Torque | 30 Nm / 2.94 kgf-m / 22.1 lb-ft @ 7000 rpm |
| Ignition | Conventional type non-transistor |
| Induction | 2 x Mikuni BS34 carburetors |
| Start System | Electric and kick-start |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | Wet multi-plate type |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Double cradle tube |
| Front Suspension | Telescopic, coil spring, oil damped |
| Rear Suspension | Swing arm, coil spring (5-way adjustable), oil damped |
| Front Brakes | Single 270 mm disc, 1 piston caliper |
| Rear Brakes | 160 mm drum |
| DIMENSION SPECS | |
| Overall Length | 2085 mm / 82.1 in |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 790 mm / 31.1 in |
| Wheelbase | 1385 mm / 54.5 in |
| Ground Clearance | 170 mm / 6.7 in |
| Dry Weight | 172 kg / 378 lbs |
| Wet Weight | 185 kg / 408 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.00-18 |
| Rear Tyre | 3.50-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 14 Litres / 3.7 US gal / 3.1 Imp gal |
| Fuel Consumption | — |
| Top Speed | — |
The 1978 version of the 400 twin, with cast wheels. Compared with the 1977 bike it had a new, more comfortable seat and improved suspension and handling. It kept the smooth DOHC twin and 6-speed box.
