1976 ｜ GS400
Suzuki’s first 4-stroke 400 cm³ model
Because Suzuki was the last manufacturer to enter the 4-stroke 400 cm³ market there was no room for failure. Under these circumstances, the GS400 was developed featuring a DOHC engine and was the only model with this type of engine in its class. This is a 400 cm³ 2-cylinder DOHC engine featuring a 180-degree crankshaft with a vibration-cancelling balancer that generates maximum horsepower of 36 PS and maximum torque of 31.3 kg-m. The engine was paired with a 6-speed transmission for enhanced riding performance, and orthodox styling was adopted. The GS400E, which was updated with star-shaped cast wheels, debuted in 1978.
| Dimensions and weight | Dimensions | Overall length | 2,080 mm |
| Overall width | 835 mm | ||
| Overall height | 1,125 mm | ||
| Wheelbase | 1,385 mm | ||
| Weight | 172 kg (Dry) | ||
| Engine | Engine type | 4-stroke, 2-cylinder, air-cooled, DOHC | |
| Engine displacement | 398 cm³ | ||
| Bore x stroke | 65.0 mm × 60.0 mm | ||
| Maximum power | 26.5kW(36PS) / 8,500rpm | ||
| Maximum torque | 31.4N-m / 7,000rpm | ||
| Transmission | 6-speed constant mesh | ||
| Front tire size | 3.00S-18-4PR | ||
| Rear tire size | 3.50S-18-4PR | ||
1991 ｜ GS400E
Authentic V-twin-engined model with a European flavor
The GS400E pairs a 400 cm³ air-cooled 4-stroke 2-cylinder DOHC engine with a durable angular pipe cradle frame. In addition to the easy-handling engine that generates high torque at low rpms, a natural and comfortable riding position helps to ensure a fun-to-ride experience for city streets or touring. This model is also equipped with a large-capacity 17-liter fuel tank, a seat specially shaped for tandem touring, and rear grab bars. The chassis features disc brakes and wide tires at both the front and rear to deliver stable cornering and riding performance.
| Dimensions and weight | Dimensions | Overall length | 2,085 mm |
| Overall width | 750 mm | ||
| Overall height | 1,050 mm | ||
| Wheelbase | 1,405 mm | ||
| Weight | 169 kg (Dry) | ||
| Engine | Engine type | 4-stroke, 2-cylinder, air-cooled, DOHC | |
| Engine displacement | 399 cm³ | ||
| Bore x stroke | 71.0 mm × 50.4 mm | ||
| Maximum power | 28.7kW(39PS) / 9,500rpm | ||
| Maximum torque | 31.4N-m / 8,000rpm | ||
| Transmission | 6-speed constant mesh | ||
| Front tire size | 110/70-17 54H | ||
| Rear tire size | 130/70-17 62H | ||