Suzuki GSX-R750

Suzuki GSX-R750

Manufacturer	Suzuki
Also called	Gixer Gixxer
Production	1985-present
Class	Supersport
Related	Suzuki GSX-R600 Suzuki GSX-R1000

The GSX-R750 is a sport bike from Suzuki's GSX-R series of motorcycles. It was introduced in 1985 and can be considered to be the first of the modern racer-replicas with many race-derived technologies and the looks of a Suzuki Endurance racer at an affordable price.

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.

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.

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.

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.

GSX-R750 (K) 1989

Widely considered the best of all gsxr models this cycle can achieve insane performance with very few modifications such as opd filters and 4 to one exhaust.Minor changes such as: modified blower bodywork, changes to graphics, silver exhaust silencers. Magazines reported that the exhaust manifold now featured small chamfers on 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.If you own one of these hold on to it.

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 748 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 dedicated on cam lobe and rocker arm 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

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 re-inforced 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

Suzuki Ram Air Direct.
Meaning there are air intakes at the front 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.

Other features included electronically controlled carburetors and 43 mm inverted forks which were fully adjustable.

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

Only minor modifications were carried out on the 1999 model including a wider 6" rear rim and 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.

GSX-R750 Y - 2000

All New Model covering 2000 through 2003 -Lighter Stronger Faster:

Engine: Much Smaller Yet Stronger motor Upgraded Fuel Injection Redesigned -Narrower cylinder head With straighter intake tracts Bigger Air Box, Better Ram Air Stainless Steel 4-1 exhaust Lighter Stronger Engine Components and covers Increased Cooling capacity

Body: More aerodynamic bodywork, smaller frontal area Redesigned instrument cluster New LCD Views: odometer, coolant temperature, clock

Frame: New re-designed twin spar frame Extended swingarm Lighter front brakes reduce un-sprung mass Lighter Cast Wheels reduce the all important rotating mass

GSX-R750 K1 - 2001

Color changes only.

GSX-R750 K2 - 2002

Few minor tweaks for 2002: changes to the EFI New Adjustable Swingarm New Mirrors New, fully polished exhaust

GSX-R750 K3 - 2003

Colors and valves changed to DOHC. Redesign year.

GSX-R750 K4 - 2004

749.00 cc (45.70 cubic inches) Dual overhead cam, 4 valves per cylinder In-line 4.

Compression:	12.3:1
Bore x stroke:	72.0 x 46.0 mm (2.8 x 1.8 inches)
Fuel delivery:	Electronic Injection
Cooling system:	Liquid
Power:	148HP (110.4kW) @ 12800 rpm.
Torque:	63.7 ft.lb (86.3 Nm) @ 10800 rpm.
Gearbox:	6-speed
final drive:	Adjustable (Chain)
Dry weight:	163.0 kg (359.4 pounds)
Seat height:	825 mm (32.5 inches) If adjustable, lowest setting.
Wheelbase:	1,396 mm (55.0 inches)
Overall length:	2,075 mm (81.7 inches)
Fuel capacity:	17.00 litres (4.49 gallons)
Front suspension:	Inverted telescopic, coil spring, fully adjustable spring preload, rebound and compression damping
Rear suspension:	Link-type, gas/oil damped, fully adjustable spring preload, compression and rebound damping
Front tire dimensions:	120/70-ZR17
Rear tire dimensions:	180/55-ZR17
Front brakes:	Double disc
Rear brakes:	Single disc
Color options:	Blue/White, Yellow/Gray

--Pawlex 21:01, 22 May 2009 (UTC)

GSX-R750 K5 - 2005

Redesign year.

GSX-R750 K7 - 2007

Redesign year. mhhm

GSX-R750 K9 - 2009

new model lol

External links

• 2007 GSX-R750 Official Suzuki site
• [1] Official Suzuki GSX-R history site
• Suzuki GSX-R750 Reviews Road tests of every GSX-R750 since 1996
• GSXR.es Suzuki GSX-R Blog