In 1989 an extra ”R” was added to the model name. The new model name was Suzuki GSX-R 400R although the internal model code (frame code) remained the same.
A Production Racer version, Suzuki GSX-R 400R SP, was released in June 1989 with single seat, close ratio gear box, uprated suspension and different CDI.
Suzuki GSX-R 400 1989 specifications
SP model Blue/White
SP model Black
Dimensions and dry mass
Type (frame code): GK73A
Overall length: 1,995 mm (78.5 in.)
Overall width: 695 mm (27.4 in.)
Overall height: 1,110 mm (43.7 in.)
Wheelbase: 1,375 mm (54.1 in.)
Ground Clearance: 125 mm (4.92 in.)
Seat height: 735 mm (28.9 in.)
Dry mass (weight): 160 kg (352 lbs)
Engine type: Liquid-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: 38 Nm (3,9 kg-m)/ 10,500 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: 110/70-R17 53H
Rear tire dimensions: 140/60-R18 64H
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.
Picture Gallery Suzuki GSX-R 400 1989