1990 Suzuki GSX-R400R

Make Model	Suzuki GSX-R 400R
Year	1991 - 92
Engine	Four stroke, transverse four cylinder, DOHC 4 valves per cylinder. TSCC
Capacity	398 cc / 24.3 cu-in
Bore x Stroke	56 x 40.4 mm
Lubrication	Wet sump
Cooling System	Liquid cooled
Compression Ratio	11.8:1
Induction	Slingshot carburetors
Ignition	CDI
Headlight	12V 35/35w x 2
Starting	Electric
Max Power	44 kW / 59 hp @ 11000 rpm
Max Torque	39.2 Nm / 4.0 kgf-m / 28.9 lb-ft @ 9000 rpm
Clutch	Wet multi-plate
Transmission	6 Speed, constant mesh
Final Drive	Chain
Primary Reduction Ratio	2.212
Final Drive Ratio	3.066
Gear Ratio	1st 3.166 / 2nd 2.125 / 3rd 1.631 / 4th 1.333 / 5th .173 / 6th 1.083
Frame	Aluminum angular pipe double cradle
Front Suspension	Telescopic forks
Rear Suspension	Full floater swing arm, non-adjustable
Front Brakes	2 x Discs, 4 piston calipers
Rear Brakes	Single disc, 2 piston caliper
Front Tyre	110/70-R17 53H
Rear Tyre	140/60-R18 64H
Rake	27° 25'
Trail	96 mm / 3.7 in
Dimensions	Length 1995 mm / 78.5 in Width 695 mm / 27.4 in Height 1110 mm / 43.7 in
Wheelbase	1375 mm / 54.1 in
Ground Clearance	125 mm / 4.9 in
Seat Height	735 mm / 28.9 in
Dry Weight	160 kg / 352 lbs
Fuel Capacity	15 Litres / 3.96 US gal / 3.3 Imp gal
Standing ¼ Mile	12.7 sec
Top Speed	194 km/h / 120.4 mph

In 1990 -92 Suzuki presented a whole new GSX-R400 (new internal model code GK76A) with inverted forks and many other modifications. The frame was upgraded from twin spur to double cradle, similar to the 1988 GSX-R750 model change.

A new 4 into 1 exhaust increased the engine power close to 60bhp and the engine redlined at 14,500 rpm. Nissin 4-cylinder front brake calipers, new fairing design with faired-in headlights, preload-adjustable forks, unbraced swing-arm, rear hugger mudguard.

Suzuki GSX-R 400R