Gsxr 750 M

Info and history of the motorcycles Suzuki Gsxr


The 1991 Gsx R 750 MThe new Gsx R 750 M is another Suzuki success in efficient application of racing technologyThe new Suzuki 1991 Gsx R 750 M brings to 750cc class production motorcycles an all-around superiority WON in successful factory racing actions and proven in a wide range of production endurance racing events. Powerful, circuit-bred performance features like engine improvements straight out of the factory team's race shop, rigid inverted front fork and Suzuki's unique progressive link rear suspension all cradled within an aluminum-alloy frame and swingarm whose efficiency has been proved with modified racing engines. The new Gsx R 750 M is another Suzuki success in efficient application of racing technology — technology that’s made the Gsx R 750 M the dominant force in 750cc Stock Production-based racing — to street bikes. It's direct access racing technology in action.

  • The latest 1991 Gsx R 750 M 749cc powerhouse features cylinder head designs straight from the factory racers:
  • Valve seats are smoothly blended with reshaped intake ports for better cylinder charging and higher torque.
  • Use of lightweight, single rocker arms to open each valve, and use of small shims to adjust valve lash, reduces inertial mass and mechanical losses.
  • Lightweight pistons with light, thin rings efficiently reduce friction and resist fluttering even at peak rpms.
  • Suzuki Advanced Cooling System (SACS), combined with air cooling, efficiently carries engine heat away to the high- capacity curved Radial Flow cooler.
  • 33mm Slingshot carburetors maintain quick engine response.
  • Cool-air induction system routes cool, dense air from the fairing intake to the airbox.
  • Aluminum-alloy double cradle frame, together with swingarm reinforced with gussets, features rigidity exceptionally well proven with modified racing engines.
  • Inverted front forks have higher rigidity and provide better fork response. Suzuki's unique progressive link rear suspension system is combined with a remote reservoir rear shock.
  • Wide aluminum-alloy wheels with hollow spokes carry high-performance 17-inch front and rear radial tires.
  • 310mm front brake discs with surface slotting and floating carrier mounts are mounted, together with 4-piston campers with staggered piston sizes.
  • New factory racer-derived, narrower fairing with flush- mounted headlights, along with sidecovers and tailsection, are wind-tunnel refined and provide better aerodynamics.

Performance 750cc street motorcycleNothing speeds technological development and advances the state of the engineering art as rapidly as racing. The racetrack rewards all-around function. Success in racing comes to efficient high-performance machines, racing motorcycles that accelerate harder, corner faster, stop quicker, simply work better. Nobody builds better racebikes than Suzuki: The Grand Prix-winning RGV500 and the stunning 750cc Formula-1 Gsx R 750 M R fielded by the Suzuki factory team are proof of that fact. But building exotic racebikes is one thing. Applying racing technology to production street motorcycles without building in an outrageous pricetag is another. That's what makes the high-performance Suzuki Gsx R line different: The direct, efficient application of racing technology. Technology that makes the 1991 Gsx R 750 M simpler, lighter, more efficient, better than the competition. Technology that made the Gsx R 750 M the dominant force in 750cc Stock Production-based racing and the backbone of privateer racing the world over. The 1991 Gsx R 750 M is more than the best all-around high - performance 750cc street motorcycle available off a showroom floor today. The 1991 Gsx R 750 M is direct access racing technology.

A Revolutionary Engine, Refined

Suzuki's unique 1991 Gsx R 750 M engine has been continually refined since its introductionRevolutionary for its combination of high torque output, design simplicity and light weight. Suzuki's unique 1991 Gsx R 750 M engine has been continually refined since its introduction. This air-cooled with SACS (Suzuki Advanced Cooling System), race-proven 749cc power-house has a bore and stroke at 70 x 48,7 mm, four valves per cylinder, double overhead camshafts and Suzuki's TSCC (Twin Swirl Combustion Chamber) design. Racing-design connecting rods carry light­weight pistons with recessed wrist - pin bosses, cut-away skirts and light, thin rings that reduce friction and resist fluttering and loss of ring seal all the way up to the 13,000 rpm redline.
New cylinder head improvements come straight out of the factory Formula-1 team's race shop. Blending the valve seats smoothly into reshaped intake and exhaust ports increases gas flow velocity, improving cylinder charging and scavenging and producing more torque. Opening each valve with a lightweight, single rocker arm (operated by an individual cam lobe) and using a small shim (held on top of each valve spring retainer) to adjust valve lash reduces inertial mass and — especially at high rpm — mechanical losses as well. And using valve springs from the Gsx R 1100 engine improves valve control at higher rpm. It all adds up to an astounding amount of torque, unheard-of response, outstanding efficiency, and the type of reliability that has made the Gsx R 750 legendary.

Suzuki Advanced Cooling System (SACS)

The Suzuki Advanced Cooling System (SACS) com­bines with air cooling to efficiently keep the 1991 Gsx R 750 M engine at optimum operating temperatures. SACS is a separate, high-volume oil flow system that carries engine heat to an efficient, high-capacity, curved Radial Flow cooler SACS results in engine temperatures much lower than those achieved with air-cooling alone, and SACS is simpler and lighter than competing water cooling systems

Slingshot Carburetors

The Suzuki 1991 Gsx R 750 M's slingshot carburetorsThe Suzuki 1991 Gsx R 750 M breathes through Slingshot smoothbore carbs featuring a unique slide design developed by Suzuki engineers working with Mikuni technicians. The design combines the best performance features of a flat slide and a round slide, delivering  the quick response and reduced throttle-movement resistance of a flat slide and the less-turbulent airflow and better sealing of a round slide. A smooth-radius air intake bell, without ridges, increases intake efficien­cy. A vent circuit built into each carburetor reduces negative pressure underneath the slide diaphragm, allowing the slide to rise more rapidly and improving throttle response. Slingshot design carburetors are lighter than conventional carburetors and are easier to work on, making jetting changes faster and simpler at the racetrack.

Cool Air Induction System

The 1991 Gsx R 750's racing induction systemCool air is dense air, and dense air means more torque output.
But the air reaching the carburetors of most motorcycles has been heated and thinned by passing tho engine or the radiator.
The 1991 Gsx R 750's racing induction system carries relatively cool, dense air to the carburetors.
The system routes air from a fairing intake scoop into the right-side frame rail; the air travels through the rear frame cross tube and is fed into the airbox intake.

Four-Into-one Exhaust System

The 1991 Gsx R 750 M's efficient Four-into-one exhaust systemThe 1991 Gsx R 750 M's efficient Four-into-one exhaust system is made of rust - resistant starless steel.
The system is deserved to help maximize cornering clearance.

Computerized Ignition

Suzuki's microcomputer-controlled digital ignition system provides ideal ignition timing at every engine rpm. Timing is not affected by heat or humidity.

Race-proven Clutch with Rack-and-pinion Actuation

The Gsx R 750 M's race-proven clutch has six beefy coil springs.
The rack-and-pinion clutch actuation system uses needle roller bearings on the pinion tor a light pull and precise feel, and gives the rider excellent feedback at the clutch engagement point.

Compact, Strong Racing Frame and Swingarm

The 1991 Gsx R 750 M's aluminum-alloy frame and swingarmThe 1991 Gsx R 750 M's aluminum-alloy frame and swingarm are an exceptionally light and rigid combination of state-of-the-art castings and extruded straight-wall tubing.
The double-cradle frame and rectangular-section swingarm designs have performed exceptionally well even with heavily modified racing engines.
Swingarm reinforcing includes gussets behind the cross brace tube.

Inverted Front Forks

Race-proven inverted forksAny racer who has made back-to-back comparisons will tell you that the fastest way to improve handling is to replace conventional front forks with a set of inverted forks. Race-proven inverted forks simply work better, and that's why they're standard on the 1991 Gsx R 750 M. Unlike conventional forks, the 1991 Gsx R 750's inverted forks have the stanchion tubes on the bottom, carrying the axle. The stanchion tubes slide inside larger diameter upper tubes grabbed by forged aluminum alloy triple clamps; because there's more surface area gripped by the triple damps, the entire assembly is more rigid, reducing side loading of fork bushings and improving fork response.
Rebound and compression damping can be adjusted independently, with 12 rebound damping settings and 12 compression damping settings. Spring preload can be adjusted across a 15mm range. Front wheel travel is 120mm (4.72 inches).

Progressive Link Rear Suspension System

Suzuki's unique progressive link rear suspension system becomes progressively firmer throughout its 136mm (5.35 inches) of wheel travel, improving response
to road irregularities around town and at highway speeds. Needlo roller bearings reduce friction in linkage pivot points. The externally adjustable, remote reservoir rear shock absorber has tour rebound damping settings and 12 compression damping settings. Spring preload can be adjusted across a 10mm range.

Wide Cast Wheels. Radial Tires

High-performance radial tiresThe 1991 Gsx R 750's wide, cast aluminum-alloy wheels carry 17-inch high-performance radial tires.
Each wheel has three hollow spokes to reduce weight, with uniform casting wall thickness for maximum strength and a sealed design to reduce stress concen­tration where the spoke meets the rim.
The front wheel measures 3.50 x 17- inches and the rear wheel measures 5.50 x 17 inches.

Four-piston Calipers, Floating Front Brake Discs

Front brake discs. Four piston calipersRace proven stainless stool alloy, 310mm (12.2-inch) front brake discs feature surface slotting and floating carrier mounts to help resist heat related distortion.
Four piston calipers have staggered (30mm loading and 34mm trailing) piston size for more even pad wear. The front master cylinder features a remote fluid reservoir.

Racebike Aerodynamics

The 1991 Gsx R 750's fairing and bodywork design came stra^straight off the factory team's 1990 racebikes. The wind-tunnel refined fairing features a slanted nose, flush mounted headlight assembly and raked windscreen tor less lift, smaller frontal area and reduced drag. The sidecovers and tailsection smooth the airflow behind the rider's legs.

Wider Seat and Optional Solo Cover

A new, wider seat increases rider and passenger comfort. An optional cover is available to replace the rear seal section, for solo riding.

Dual Lighting, Complete Instrumentation

The 1991 Gsx R 750's new dual-halogen-bulb headlight The 1991 Gsx R 750's new dual-halogen-bulb headlight assembly is complimented by a new front running light and a now dual-bulb taillight integrated into the tailsection.
Instruments include a large tachometer, speedometer and a full array of indicator lights.