Wednesday, 21 July 2010

Suzuki GSX-R 750 1990-1999 History Part 3

After 2 part of Suzuki GSX-R 750 History, now we can find about new era of GSX-R 750. yeah this is Suzuki GSX-R 750 1990-1999 History Part 3. Check this out.
GSX-R750 (L) 1990

Although this model looks very similar to the previous '89 model many changes were made. The 90 model featured changes to the engine, suspension, body work, brakes and chassis. This was the first GSX-R to be fitted with inverted forks as standard (USA models retained the conventional forks until 1991), and returned to the bore and stroke dimension of the original long-stroke engine.

The engine returned to the 749 cc engine bore and stroke dimensions of the original long-stroke engine but still maintained the 13,000 rpm redline. It now featured mm valve (smaller than the 88-89 short stroke but larger than the 85-87) and used larger carburetors. The new Mikuni model BST38SS carburetors were 38 mm diameter and featured an additional high-speed circuit (circuit was blocked in USA models) and the slide breathers were now divorced from air box. The exhaust system was also changed, gone were the dual silencers and replaced with one stainless steel silencer on the right side. The transmission output shaft was lengthened to accommodate a wider wheel. A new curved oil-cooler design and oil lines (attached to the oil pan similar to the original 85-87 engines) were installed.

The frame was changed for 90 and used some of the features from the '89 GSX-R 1100 frame. The rake was now 25.5 degrees and wheel base 55.7 inches (1,410 mm). The front suspension now had inverted forks, the triple clamps (yokes) and handlebars were changed to accommodate the new forks. The rear suspension featured a new damper (shock) and swingarm. The rear damper (shock) now had a remote reservoir and damping adjustment. The revised swingarm now featured cast ends for the axle adjustment. The rear wheel was widened to 5.5 inches (previously 4.5inches) but the tire size remained the same. A non-adjustable steering damper was added which attached from the left frame rail to a clamp on the left fork (US models did not receive the damper but the frame had the tapped mounting holes). The rear sprocket carrier and sprocket changed to a six-bolt design (previously five). The front brake rotors changed to a slotted design (previously cross drilled holes).

The body work changed slightly also. The side vents became less rectangular and in a slightly different position. Anew fender was also used with the inverted forks (except US).

GSX-R750 (M) 1991

The '91 GSX-R750M gained 15 kg over the previous model. The most notable feature of the "M" are the faired in headlamps and a slanted nose, both of which were designed to reduce drag. Also fitted was a new larger seat and new rear body work that featured twin tail lamps. This was the last GSX-R to use the oil-cooled SACS engine (except for US). Internal engine changes included a new valvetrain that used one dedicated cam lobe and rocker arm (finger follower) per valve (previous models used one lobe and one forked rocker per two valves). Valve clearance (lash) was now adjusted with shims (previous models used a screw and nut). The cam duration and indexing changed slightly as well as the porting according to a magazine article. The rear tire width was increased to a 170 mm section width. The gauges also changed to white colored needles (previously amber colored).
GSX-R750 (N) 1992
1992 Suzuki GSX-R750

1992 US models are the same as the 1991 with different paint and graphics. All other markets got the new water-cooled GSX-R 750.
GSX-R750 (WN) 1992

New water cooled engine and revised frame, bodywork and suspension. USA market models retained the oil-cooled engine and the USA 1992 model is basically the same as the 91 model with different graphics. A sleeved down version was available as the GSXR-600 for 92 and 93, both years were available with non inverted, traditional forks. Interestingly, the 1992 GSXR-600 was water cooled for the US market while the 750 had to wait one more year.
GSX-R750 (WP) 1993

Mostly cosmetic changes, minor revision of engine internals, minor increase in power.
GSX-R750 (WR) 1994

Reduced power and weight on last years model. The inverted forks for this year were blue annodized.
GSX-R750 SPR 1994-1995

A limited-edition racing homologation model and was available for two years. Factory parts included wide-mouthed TRM40 carbs, close-ratio gearbox, magnesium engine covers, ally water pump, six-piston brake calipers and a new braced swingarm, holding a wider 180-rear-section tyre. The SPR was also around 10 kilos lighter than the WP.
GSX-R750 (WS) 1995

Last model to use the double-cradle frame. Increased power and weight and over last years model. The US model was essentially the SPR model in terms of technical specs. Inverted forks were clear annodized for 95. Frame was reinforced for more stiffness over the 94 model year and the top fairing was all new with lighter, twin reflector beam headlights. Touted by Motorcyclist as having the most ground clearance leaned over, just behind a 916.
GSX-R750 (T) 1996
1996 Suzuki GSX-R750

The '96 GSX-R introduced a new twin-spar frame which was derived from Suzuki's RGV 500 GP racer. A new compact and lightweight engine incorporated magnesium covers on the cylinder head, starter motor and clutch cover to aid weight reduction. These changes resulted in a decrease in weight by 20 kg to 179 kg, while power had increased to a 128 bhp (95 kW). This year's model finally addressed the weight problems that had plagued the GSX-R though the first half of the 90s.

Other features included electronically controlled carburetors and 43 mm inverted forks which were fully adjustable. Also 6in rear rim was fitted as std with a 190/50-17 size tyre as fitted to all model from 1996 to 1999.
GSX-R750 (V) 1997

Minor internal tweaks on the 1996 model, improved aerodynamics.
GSX-R750 (W) 1998

Introduction of electronic fuel injection. Gain in power to 134bhp.
GSX-R750 (X) 1999
1999 Suzuki GSX-R750

Only minor modifications were carried out on the 1999 model consisting of new graphics. The 1999 Model year GSX-R won the sportbike of the year award, produced 134 Crank Horsepower, and was the last year of the known "SRAD" design.(wikipedia)
All pic is for sample only and We can not guarantee that the information and pics on this page is 100% correct. To be continued to Suzuki GSX-R 750 History part 4 finish.
Have fun !!


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