Suzuki GSX400S (1981-83)

The Suzuki GSX400S is a motorcycle produced by Suzuki between 1981 and 1983. It features a four-stroke, parallel twin engine with a capacity of 398 cc, and a bore x stroke of 67 x 56.6 mm. The engine is air-cooled and has a compression ratio of 10.5:1. The bike has 44 horsepower at 9500 rpm and 26.8 lb-ft of torque at 8000 rpm. The clutch is a wet, multiple-plate design, and the transmission is six-speed. The final drive is by chain, with a gear ratio of 1st 2.461 / 2nd 1.777 / 3rd 1.380 / 4th 1.125 / 5th 0.961 / 6th 0.851:1. The front suspension consists of air-assisted telescopic forks, while the rear suspension is dual shocks, preload-adjustable. The motorcycle has a single disc front brake and a drum rear brake. The front tire is 3.60S-18 4PR, and the rear tire is 4.10S-18 4PR. The bike has a wheelbase of 1415 mm and a dry weight of 175 kg. The fuel capacity is 16 liters, and the average fuel consumption is 5.2 L/100 km. The standing quarter-mile time is 15.2 seconds, and the top speed of the bike is 158 km/h.


Technical specifications:

Make Model: Suzuki GSX 400E – S

Year: 1981 – 83


Engine: Four stroke, parallel twin, DOHC, 4 valves per cylinder.
Capacity: 398 cc / 24.3 cu in
Bore x Stroke: 67 x 56.6 mm
Cooling System: Air cooled
Compression Ratio: 10.5:1
Lubrication: Wet sump
Oil Capacity: 3.0 Litres / 3.2 US qt / 2.6 Imp qt
Induction: 2 x Mikuni BS34SS carburetors
Ignition: Transistorized
Starting: Electric
Max Power: 32.8 kW / 44 hp @ 9500 rpm
Max Torque: 36.3 Nm / 3.7 kgf-m 26.8 lb-ft @ 8000 rpm
Clutch: Wet multiple plates, coil spring
Transmission: 6 speed constant mesh
Final Drive: Chain

Gear Ratio: 1st 2.461 / 2nd 1.777 / 3rd 1.380 / 4th 1.125 / 5th 0.961 / 6th 0.851:1
Primary Drive Ratio: 2.714
Secondary Drive Ratio: 2.933
Frame: Double cradle
Front Suspension: Air assisted telescopic forks
Rear Suspension: Dual shocks, preload adjustable
Front Brakes: Single disc
Rear Brakes: Drum
Front Tyre: 3.60S-18 4PR
Rear Tyre: 4.10S-18 4PR
Caster: 27.50
Trail: 102 mm / 4.02 in
Dimensions: Length 2105 mm / 82,9 in Width 755 mm / 29,7 in Height 1070 mm / 42,1 in
Wheelbase: 1415 mm / 55,7 in
Dry Weight: 175 kg / 386 lbs
Fuel Capacity: 16 Litres / 4.2 US gal / 3.5 Imp gal
Consumption Average: 5.2 L/100 km / 19.1 km/l / 45 US mpg / 64 Imp mpg
Standing 1/4 Mile: 15.2 sec
Top Speed: 158 km/h / 98 mph

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