| MODEL | SUZUKI GSX-R 750L 1990 |
| Year | 1990 |
| Engine Type | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 749 cc / 45.7 cu in |
| Bore X Stroke | 70 x 48.7 mm |
| Compression Ratio | 10.8:1 |
| Cooling System | Air/oil cooled (SACS) |
| Max Power | 83.8 kW / 115 hp @ 11000 rpm (75.9 kW / 101.8 hp at rear tyre) |
| Max Torque | 78 Nm / 7.9 kgf-m / 57.5 ft-lb @ 10000 rpm |
| Ignition | Computer controlled electronic ignition |
| Induction | 4 x 38 mm Mikuni constant-vacuum carburetors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 6 speed, constant mesh |
| Clutch | Cable operated, wet multiple, coil spring |
| Final Drive | #530 chain, O-ring sealed, 108 links |
| CHASSIS SPECS | |
| Frame | Lightweight aluminium alloy frame, 45 mm box-tube main section, cast swingarm pivot |
| Front Suspension | 41 mm upside-down telescopic fork, adjustable spring preload, 8-way damping, 10-way compression |
| Rear Suspension | Full-floater monoshock, 4-way adjustable preload and rebound |
| Front Brakes | 2 x 310 mm discs, 4 piston calipers |
| Rear Brakes | Single 280 mm disc, 1 piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2070 mm / 81.5 in |
| Overall Width | 730 mm / 28.7 in |
| Overall Height | 1135 mm / 44.7 in |
| Seat Height | 790 mm / 31.1 in |
| Wheelbase | 1420 mm / 55.9 in |
| Ground Clearance | — |
| Dry Weight | 193 kg / 425 lb |
| Wet Weight | 234 kg / 516 lb |
| WHEEL SPECS | |
| Front Tyre | 120/70 ZR17 |
| Rear Tyre | 170/60 ZR17 |
| FUEL SYSTEM | |
| Fuel Capacity | 21 Litres / 5.5 US gal / 4.6 Imp gal |
| Fuel Consumption | 6.8 L/100 km / 14.8 km/l / 34.8 US mpg / 41.5 Imp mpg |
| Top Speed | 247.3 km/h / 153.6 mph |
The 1990 L model reverted to the long-stroke 749 cc engine and was the first with upside-down forks on the GSX-R. It got a wider, stiffer frame, bigger rear wheel, 38 mm carburettors and a new 4-into-1 exhaust. It was heavier than before but offered better handling and braking.
