1983 Suzuki GSX400FW

Make Model	Suzuki GSX 400FW
Year	1983
Engine	Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder.
Capacity	398 cc / 24.3 cu in
Bore x Stroke	53 x 45.2 mm
Compression Ratio	10.9:1
Cooling System	Liquid cooled
Lubrication System	Wet sump
Induction	2 x Mikuni BS26SS carburetors
Ignition	Fully transistorised
Starting	Electric
Battery	12V, 12Ah
Max Power	36.9 kW / 49.5 hp @ 10500 rpm
Max Torque	35.3 Nm / 3.6 kgf-m / 26.0 lb-ft @ 8500 rpm
Clutch	Wet, multiplate
Transmission	6 Speed
Final Drive	Chain
Primary Reduction	2.212
Final Reduction	3.066
Gear Ratios	1st 3.166 (38/12) / 2nd 2.125 (34/16) / 3rd 1.631 (31/19) / 4th 1.333 (28/21) / 5th 1.173 (27/23) / 6th 1.083 (26/24)
Front Suspension	Telescopic fork, oil dampened
Front Wheel Travel	150 mm / 5.9 in
Rear Suspension	Swingarm, mono shock
Rear Wheel Travel	107 mm / 4.2 in
Front Brakes	2 x Discs
Rear Brakes	Single disc
Front Tyre	100/90-16 54S
Rear Tyre	110/90-18 61S
Rake	27.2°
Trail	96 mm / 3.8 in
Dimensions	Length: 2110 mm / 83.1 in Width: 745 mm / 29.3 in Height: 1180 mm / 46.5 in
Wheelbase	1435 mm / 56.5 in
Ground Clearance	160 mm / 6.3 in
Seat Height	780 mm / 30.7 in
Dry Weight	177 kg / 390 lbs
Wet Weight	197 kg / 434 lbs
Fuel Capacity	17 Litres / 4.5 US gal / 3.7 Imp gal
Fuel Reserve	3.0 Litres / 3.2 US qt / 2.6 Imp qt
Oil Capacity	2.0 Litres / 2.1 US qt / 1.8 Imp qt

The liquid-cooled GSX400FW (internal code GK71A) was launched in Japan in March 1983. Yoshimura tuned up the engine and built up the special frame to entry Japanese domestic TT-F3 race. 184 bikes found their way to Sweden in 1983, where it was sold under the model name GSX400FWS and had 52 hp in 1983. The Japanese version had 50 ps (49,5 hp).

The GSX400FW caused a small sensation when it was launched in 1983. 52 bhp from a 400cc four-stroke, combined with a sporty, almost racer-likechassis was a great new model from Suzuki. The liquid-cooled engine was slightly heavier than its predecessor but could be revved up to 11,500 rpm and deliver more power. The handling of the bike was considered a s very good, the disc brakes excellent (the rear brake was almost too good). It was a full-size bike and could be ridden with a passenger, but the huddled-up riding position and the need to use very high revs to get the most out of the engine could be annoying in a long run. The fuel economy was slightly worse than with other 400cc bikes but still quite good.

Source suzukicycles.org

Suzuki GSX 400FW