The power/weight ratio was a bit better in 1986 0,39 hp/kg (0,18 hp/lbs). The upgraded Suzuki GSX-R400 new chassis, shorter wheelbase and was totally redesigned.
I fact, you could say it was a totally new bike. It even got a new internal model code: GK71F (presented in March 1986).
The 1986 and 1987 year’s engines differ from the other models, they do not have the normal type of liquid-cooled engines. Instead they the use the SATCS (Suzuki Advanced Three-way Cooling System) that used water, oil and air to keep the engine from overheating.
The 1986 year’s GSX-R400 (Type 3) had a single square headlight instead of two round headlights. The new front design didn’t gain popularity and the twin headlight were reintroduced the following year.
Suzuki GSX-R400 1986 Specifications
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Dimensions and dry mass
Type (frame code): GK71B
Overall length: 2,055 mm (80.9 in.)
Overall width: 680 mm (26.8 in.)
Overall height: 1,155 mm (45.5 in.)
Wheelbase: 1,400 mm (55.1 in.)
Ground Clearance: 135mm (5.3 in.)
Dry mass (weight): 153 kg (337 lbs)
Engine type: Water/air/oil-cooled DOHC inline-4, 16 valves, TSCC
Bore x stroke: 53,0 mm x 45,2 mm (2.087 x 1.780 in.)
Piston displacement: 398 cc
Compression ratio: 11,3 :1
Maximum power: 59 hp/ 12,000 rpm
Maximum torque: 3,8 kg-m/ 10,500 rpm
Maximum speed: 175 kph
Starting system: Electric starter
Lubrication system: Wet sump
Carburetor: AISAN AS27VW x 2
Clutch type: Wet multi-plate
Transmission type: 6-speed constant mesh
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
Caster: 27° 25′
Trail: 96 mm
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: 110/90-16 54h
Rear tire dimensions: 110/90-18 61h
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 1986 Image Gallery