Suzuki GSX-R400
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The Suzuki GSX-R400 was a 400 class
sport bike A sports motorcycle, sports bike, or sport bike is a motorcycle designed and optimized for speed, acceleration, braking, and cornering on asphalt concrete race tracks and roads. They are mainly designed for performance at the expense of comfort, ...
produced by Japanese motorcycle manufacturer
Suzuki is a Japanese multinational mobility manufacturer headquartered in Hamamatsu, Shizuoka Prefecture, Shizuoka. It manufactures automobiles, motorcycles, all-terrain vehicles (ATVs), outboard motor, outboard marine engines, wheelchairs and a va ...
between 1984 and 1996. It was the first GSX-R model ever made by Suzuki, as a race replica evolution of sport touring GSX series. Like other bikes in its class, the GSX-R400 was continuously updated and subsequently there is a slew of different models. All GSX-R400s were powered by naturally-aspirated, carburetted, 398cc
four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...
inline-four engine A straight-four engine (also referred to as an inline-four engine) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft. The majority of automotive four-cylinder engines use a straight-four layout ( ...
s with four valves per cylinder and dual overhead camshafts. Whilst all engines were
liquid-cooled Liquid cooling refers to cooling by means of the convection or circulation of a liquid. Examples of liquid cooling technologies include: * Cooling by convection or circulation of coolant, including water cooling * Liquid cooling and ventilatio ...
, some models were also
air An atmosphere () is a layer of gases that envelop an astronomical object, held in place by the gravity of the object. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosph ...
and
oil-cooled Oil cooling is the use of engine oil as a coolant, typically to remove surplus heat from an internal combustion engine. The hot engine transfers heat to the oil which then usually passes through a heat-exchanger, typically a type of radiator know ...
. Suzuki also changed the GSXRs frame type multiple times - with different twin-spar and double-cradle arrangements sampled throughout the production run - though they were always constructed solely of aluminium.


Models

The 1984 GSX-R400 was released in Japan and had . In 1985 a fuel level gauge was added which showed the remaining amount of fuel indicated by the right side combination meter when the ignition was in the "Off" position. The bike was almost entirely redesigned for 1986. The
power-to-weight ratio Power-to-weight ratio (PWR, also called specific power, or power-to-mass ratio) is a calculation commonly applied to engines and mobile power sources to enable the comparison of one unit or design to another. Power-to-weight ratio is a measurement ...
was increased to 0.39 hp/kg with the new chassis and shorter wheelbase that Suzuki introduced. The 1986 and 1987 models use slightly different engines than before. The liquid cooling design was dropped for Suzuki's "SATCS" (Suzuki advanced three-way cooling system) that used water air and oil to keep the engine cool. A new single square headlight was also introduced which was never very popular and Suzuki returned the headlights to the two circular lights the following year. Not many changes were made in 1987 with largest ones being the new wheels, twin headlights, gold brake calipers, the new paint scheme and the new exhaust design. A special edition was also available in 87' with a black/gold paint scheme. In 1988 the GSX-R received a new aluminium frame which increased the weight and new fairings with a lower wheelbase once again to create a more stable and better handling bike. The model also got slingshot carburetors, polished stainless steel silencers, curved radiator, Tokico 4-cylinder front brake calipers and a rear hugger mudguard. The new 4 into 2 exhaust was designed to create more midrange torque but this had only a marginal effect on the engines power. Yoshimura also produced the cyclone system 4 into 1. In 1988 a sports production model was introduced (SP) which incorporate among other things no passenger foot pegs and the rear shocks were visible under the seat. In 1989, the name of the model was additionally supplemented with the letter "R". The new GSX-R400R model name. In 1990, Suzuki introduced a completely new model GSX-R400 with inverted forks and new double cradle aluminum frame and with a new 4 into 1 exhaust power increased to . In 1993 Powers was reduced to because of a power restriction in Japan. Production was ceased in May 1996.


Specifications


See also

*
Honda CBR400 The Honda CBR400 is a Japanese domestic market small-capacity sport motorcycle, part of the CBR series introduced by Honda in 1983. It was the first Honda motorcycle to wear a CBR badge. The CBR400R (NC17) naked bike was launched in December 198 ...
* Honda RVF400 *
Yamaha FZR400 The Yamaha FZR400 was a ' class sport bike produced by Yamaha Motor Company between 1987 and 1994. The FZR400 was updated every year up until 1994, after which production ended. All FZR400s were powered by naturally aspirated, carburetted, liqu ...
*
Kawasaki ZXR400 The Kawasaki ZXR400 is a sport bike introduced by Kawasaki Heavy Industries Motorcycle & Engine, Kawasaki in 1989. It was one of the most popular of the sport bikes that swept across Japan and later Europe in the 1990s. It was discontinued in 1999 ...


References

{{Suzuki motorcycles GSX-R400 Sport bikes Motorcycles introduced in 1984