Suzuki GSX-R 750J (1988)

The Suzuki GSX-R 750J is a motorcycle model from 1988 with a four stroke, transverse four cylinder, DOHC engine with 4 valves per cylinder and a displacement of 748 c / 45.6 cub. in. It has a compression ratio of 10.9:1 and is cooled by air/oil. The engine oil used is 10W/40, and it has a 4-into-1-into-2 stainless steel exhaust with wet sump lubrication. Induction is done through 4 x 36 mm Mikuni constant-velocity semi-flatslide carburetors and ignition is full transistor. The bike has an electric starter with a maximum power of 80.2 kW / 112 hp @ 11000 rpm and torque of 74.5 Nm / 7.6 kgf-m / 54.9 ft-lb @ 10000 rpm. Transmission is handled by a 6-speed, constant mesh gearbox and it has a final drive of #530 Chain, O-ring sealed, 108 links.

The Suzuki GSX-R 750J’s frame is made of lightweight aluminium alloy and features a 43mm telescopic front fork suspension and a full-floater monoshock rear suspension, both adjustable for preload and rebound damping. The front brakes have 2 x 310mm discs with 4 piston calipers, while the rear brake has a single 230mm disc and 1 piston caliper. The wheels are alloy and have a 3 spoke design with a front tyre size of 120/60 ZR17 and a rear tyre size of 160/60 ZR17. The bike has a wheelbase of 1400 mm / 55.1 in. and is 2055 mm / 80.9 in. in length, 730 mm / 28.7 in. in width, and 1100 mm / 43.3 in. in height. It has a dry weight of 195 kg / 430 lbs and a fuel capacity of 21 Litres / 5.5 US gal / 4.6 Imp gal, with an average consumption of 6.6 L/100 km / 15.1 km/l / 35.5 US mpg / 42.8 Imp mpg.

The Suzuki GSX-R 750J has a stopping distance of 37.2 m / 122 ft from 100 kmh-0 (60mph-0) and a quarter-mile time of 11 seconds / 203 km/h / 126 mph with a top speed of 248.3 km/h / 154.3 mph. This model came in color combinations of White/Blue, Red/Black, and Red/White. Reviewed by Cycle World in 1988 and Moto Sprint Group Test in 1990, it was part of a well regarded series.

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Technical specifications:

Make Model: Suzuki GSX-R 750J

Year: 1988

Engine: Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder.

Capacity: 748 c / 45.6 cub. in.

Bore x Stroke: 73.0 x 44.7 mm

Compression Ratio: 10.9:1

Cooling System: Air/Oil cooled

Engine Oil: 10W/40

Exhaust System: 4-into-1-into-2 Stainless-steel exhaust

Lubrication: Wet sump

Induction: 4 x 36 mm Mikuni constant-velocity semi-flatslide carburetors

Ignition: Full transistor

Spark Plug: NGK JR9C

Starting: Electric

Max Power: 80.2 kW / 112 hp @ 11000 rpm

Max Power Rear Tyre: 79.2 kW / 106.2 hp @ 11000 rpm

Max Torque: 74.5 Nm / 7.6 kgf-m / 54.9 ft-lb @ 10000 rpm

Clutch: Cable operated, wet multiple, coil spring

Transmission: 6 Speed, constant mesh

Final Drive: #530 Chain, O-ring sealed, 108 links

Gear Ratios: 1st 2.77 / 2nd 2.06 / 3rd 1.65 / 4th 1.40 / 5th 1.23 / 6th 1.09:1

Frame: Lightweight aluminium alloy frame incorporated 45mm box tube main section and cast swing arm pivot

Front Suspension: 43 mm Telescopic forks adjustable for preload rebound damping

Rear Suspension: Full-floater Monoshock adjustable for preload rebound damping

Front Brakes: 2 x 310 mm Discs, 4 piston calipers

Rear Brakes: Single 230 mm disc, 1 piston caliper

Wheels: Alloy, 3 spoke

Front Tyre: 120/60 ZR17

Rear Tyre: 160/60 ZR17

Wheelbase: 1400 mm / 55.1 in.

Dimensions: Length 2055 mm / 80.9 in. Width 730 mm / 28.7 in. Height 1100 mm / 43.3 in.

Dry Weight: 195 kg / 430 lbs

Wet Weight: 223.6 kg / 493 lbs.

Fuel Capacity: 21 Litres / 5.5 US gal / 4.6 Imp gal

Average Consumption: 6.6 L/100 km / 15.1 km/l / 35.5 US mpg / 42.8 Imp mpg

Stopping Distance 100 kmh-0 (60mph-0): 37.2 m / 122 ft

Standing 1/4 mile: 11 sec / 203 km/h / 126 mph

Top Speed: 248.3 km/h / 154.3 mph

Colours: White/Blue, Red/Black, Red/White

Source: Cycle World 1988

Road Test: Moto Sprint Group Test Moto Sprint Group Test 1990