Suzuki GSX-R750 : Wikis (The Full Wiki)

6 Jan 2015 | Author: | Comments Off on Suzuki GSX-R750 : Wikis (The Full Wiki)
Suzuki GSX 1200

Contents

Air and oil-cooled

The oil cooled models can be further divided into the first generation and second generation oil-cooled models. They are informally referred to as slabbies (slang) and slingshots respectively. The 85-87 models featured body work which is very flat compared to modern sport-bikes. hence slab-side.

The ’88-91 (92 USA) models are sometimes referred to as slingshots because the carburetors introduced in 1988 were marketed as slingshot carburetors (slingshot describes the cross section of the semi-flat slide carbs).

GSX-R750 (F) 1985

The original model featured a lightweight aluminum alloy frame, flatslide carbs, twin discs with 4-pot calipers and 18-inch (460 mm) tires both front and rear. The unusual choice of an oil-cooled engine was made to save weight as compared with the heavier water-cooled engines of the time.

Engine Type: 16-valve, 4-stroke, DOHC in-line four

Power: 106.00 HP (77.4 kW)) @ 10500 RPM

Displacement: 749cc (45.71 cubic inches)

Compression: 9.8:1

Cooling System: Air-Cooled

Front Brakes: Hydraulic twin disc with dual opposed piston calipers

Rear Brakes: Single disc, hydraulic

GSX-R750 (G) 1986

The 1986 received a 25 mm longer swing arm to help calm the handling. Apart from a modified belly pan and upgraded headlamps there is very little difference between the 1985 and 1986 models. This is the first year the model was introduced to the USA.

Engine Type: 16-valve, 4-stroke, DOHC in-line four

Cooling System: Air/oil Cooled

Rear Brakes: Single disc, hydraulic

Fuel Capacity:5.02 gallons

GSX-R750R 1986

Racing homologation Limited Edition model, limited production. Including a dry clutch system, solo seat rear section bodywork and Limited Edition graphics.

GSX-R750 (H) 1987

The 1987 model received upgraded 41 mm front forks with NEAS (New Electrically Activated Suspension) from the previous year’s RR and a steering damper was fitted as standard. A larger 21 liter fuel tank was added.

Engine Type: 16-valve, 4-stroke, DOHC in-line four

Displacement: 749.00cc (45.70 cubic inches)

Compression: 9.8:1

Cooling System: Air-Cooled

Front Brakes: Hydraulic twin disc with dual opposed piston calipers

Rear Brakes: Single disc, hydraulic

GSX-R750 (J) 1988

First major revision. New chassis design, engine revisions and body work. Introduction of a new short-stroke version of the oil-cooled engine, now displacing 748 cc.

Engine had 73 mm bore and 44.7 mm stoke and could achieve higher engine speeds (13,000 rpm redline indicated, but rev limited engaged at 12,500 according to the Suzuki shop manual). Internal engine dimensions changed to accommodate the new bore and stroke. This engine used larger valves and carburetors then previous years.

Mikuni model BST36SS carbs were 36 mm diameter and featured vacuum operated slides. The slide cross section resembled the shape of a slingshot. A larger clutch was used on the short stroke engine with 6 springs. New styling, and twin black silencers (aka mufflers). Wheels were now a 17-inch (430 mm) diameter, three spoke design and used a 160/60VR17 in the rear and 120/70VR17 in the front.

Slingshot graphic first appeared on the bodywork. Forks now used a cartridge design and were 43 mm in diameter. The second generation model was heaver than the first but had a stiffer frame and more power.

Engine Type: 16-valve, 4-stroke, DOHC in-line four

Bore x Stroke: 73.0 x 44.7 mm (2.9 x 1.8 inches)

Fuel System: Carburetion

Ignition: Digital/Transistorized

Cooling System: Air-Cooled

Gearbox: 6-speed (1 down, 5 up)

Final Drive: Chain

Dry Weight: 429.9 pounds

Seat Height: 830mm (32.7 in.)


Overall Height: 1135mm (44.7 in.)

Wheelbase: 1400mm (55.1 in.)

Rear Brakes: 220mm single hydraulic disc

GSX-R750 (K) 1989

Minor changes such as: modified lower bodywork, changes to graphics and silver exhaust silencers. Magazines reported that the exhaust manifold now featured small chamfers on the collector for increased ground clearance. Cycle magazines also reported a change to the rear shock mounting geometry and front fork length to improve ground clearance.

Graphics/paint schemes varied slightly between global markets. US models were available in blue/white and red/white schemes. The SACS acronym decal, located on the lower body work of the blue/white models, changed from a diagonal lettering to a straight lettering [ citation needed ] .

GSX-R750R 1989

Limited edition racing homologation model. The redesigned engine reverted to the original long stroke (70 x 48.7mm) configuration. The crankcase, crankshaft connecting rods and clutch were upgraded to serve as a ready to race platform.

The RR also received new 40 mm Slingshot carbs and 4-into-1 exhaust pipe, close ratio gearbox, braced rear swing arm. single seat unit and 19L aluminium fuel tank. Model was never sold in the US.

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.

Suzuki GSX 1200

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

Water-cooled

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

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.

SRAD

Meaning there are air intakes at the front that force air directly into the airbox. All models as of 1996 have employed this design.

GSX-R750 (T) 1996

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.

Suzuki GSX 1200
Suzuki GSX 1200
Suzuki GSX 1200
Suzuki GSX 1200

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