Suzuki GSX-R400 1991 change the color, gold anodized the front fork outer tube and front disc housing. A rear model shock of the standard model was also equipped with a reservoir tank.
Redesigned brake discs and new painting, otherwise pretty much the same design as in 1990.
The rear shocks with gas reservoir that were mounted in the ’90 year’s SP (Sports Production) were now fitted even in the standard model (visible above the rear axle). Adjustable brake lever and a steering damper included.
Suzuki GSX-R400 1991 Specifications
Black/Pink japan edition
SP model Blue/White
Dimensions and dry mass
Type (frame code): GK76A
Overall length: 1,995 mm (78.5 in.)
Overall width: 710 mm (28.0 in)
Overall height: 1,060 mm (41.7 in)
Wheelbase: 1,435 mm (56.5 in)
Ground Clearance: 125 mm (4.92 in.)
Seat height: 735 mm (28.9 in.)
Dry mass (weight): 167 kg (367 lbs)
Engine type: Water-cooled DOHC inline-4, 16 valves
Bore x stroke: 56,0 mm x 40,4 mm (2.205 x 1.591 in.)
Piston displacement: 398 cc
Compression ratio: 11,8 :1
Maximum power: 59 hp/ 12,000 rpm
Maximum torque: 4,0 kg-m/ 10,000 rpm
Top speed: about 200 km/h (124 mph)
Starting system: Electric starter
Lubrication system: Wet sump
Carburetor: Mikuni 27mm x 2
Clutch type: Wet multi-plate
Transmission type: 6 speeds, chain drive
Gearshift pattern: 1-down, 5-up
Primary reduction ratio: 2.212
1st gear ratio: 3.166
2nd gear ratio: 2.125
3rd gear ratio: 1.631
4th gear ratio: 1.333
5th gear ratio: 1.173
6th gear ratio: 1.083
Final drive: 3.066 chain
Frame type: Aluminum angular pipe double cradle
Trail: 101 mm (4.0 in.)
Front suspension: Telescopic, coil spring, oil dampened with anti-dive
Rear suspension: Full floater suspension system, spring pre-load fully adjustable, oil dampened
Front brake: Dual hydraulic disc, four piston calipers
Rear brake: Single hydraulic disc, dual piston calipers
Front tire dimensions: 120/60-17
Rear tire dimensions: 160/60-17
Ignition type: fully transistorized
Ignition timing: 15º BTDC below at 1650 r/min and 35º BTDC above 3.500 r/min
Spark plug: ND U24FS-U or NGK C8HA
Battery: 12V 39.6 kC (11Ah)/10HR
Generator: Three-phase A.C. Generator
Headlight: 12V 35/35w x 2
Power/weight ratio: 2,57 kg/ps
Center stand: Yes
Fuel tank: 18 l.
Reserve: 3.5 l.
Engine oil: 2.6 l.
Front fork oil (each leg): 397 ml.
Cooling solution: 2,185 ml.
Suzuki GSX-R400 1991 Image Gallery