Suzuki GSX1100EF (1985)

The Suzuki GSX1100EF, also known as the GS1150EF, is a four-stroke motorcycle from 1985. Its engine is a transverse, four-cylinder DOHC with four valves per cylinder that can hold 1135 cc or 69.35 cubic inches. It has a bore and stroke of 74 x 66 mm and an air-cooled cooling system. The compression ratio is 9.7:1, and the lubrication is wet sump. The induction system uses four 36mm Mikuni carburetors, and the ignition is an analogue CDI (capacitive discharge ignition) with electric starting and a 12V, 14Ah battery. The motorcycle’s maximum power is 85 kW or 114 horsepower at 8,700 rpm, and the maximum torque is 98 Nm, 10.0 kgf-m, or 72.3 lb-ft at 6500 rpm. It has a wet, multiple-disc clutch operated by cable and a five-speed transmission with a chain final drive. The frame is a double-cradle steel frame, and the suspension consists of a 37mm Kayaba air-assisted, adjustable spring preload and compression damping system for the front and a single Kayaba shock with adjustable spring preload and rebound damping for the rear. The tires are 110/90-V16 for the front and 130/90-V17 for the rear. It has a fuel capacity of 20 liters or 5.2 US gallons and weighs 238 kg or 524 lbs dry or 256 kg or 56.43 lbs wet. The standing 1/4 mile is 11.1 seconds with a speed of 197.9 km/h or 123 mph, and the top speed is 225 km/h or 140 mph. A group test by Motosprint in 1985 rated the motorcycle’s performance positively.

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Technical specifications:

Make Model: Suzuki GSX 1100EF (GS 1150EF)

Year: 1985

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

Capacity: 1135 cc / 69.35 cu-in

Bore x Stroke: 74 x 66 mm

Cooling System: Air cooled

Compression Ratio: 9.7:1

Lubrication: Wet sump

Induction: 4 x 36mm Mikuni carburetors

Ignition: Analogue CDI (Capacitive Discharge Ign.)

Starting: Electric

Battery: 12V, 14Ah

Max Power: 85 kW / 114 hp @ 8.700 rpm

Max Torque: 98 Nm / 10.0 kgf-m / 72.3 lb-ft @ 6500 rpm

Clutch: Wet, multiple discs, cable operated

Transmission: 5 Speed

Final Drive: Chain

Primary Reduction Ratio: 1.780

Gear Ratios: 1st 2.500 / 2nd 1.777 / 3rd 1.380 / 4th1.125 / 5th 0.961

Final Reduction Ratio: 2.800

Frame: Steel, double cradle frame

Front Suspension: 37mm Kayaba air assisted, adjustable spring preload and compression damping.

Front Wheel Travel: 150 mm / 5.9 in

Rear Suspension: Single Kayaba shock, adjustable spring preload and rebound damping.

Rear Wheel Travel: 114 mm / 4.4 in

Front Brakes: 2 x 275 mm Discs, 2 piston calipers

Rear Brakes: Single 275 mm disc, 1 piston caliper

Front Tyre: 110/90-V16

Rear Tyre: 130/90-V17

Dimensions: Length 2240 mm / 88.2 in Width 730 mm / 28.7 in Height 1280 mm / 50.4 in

Wheelbase: 1 550 mm / 61.0 in

Ground Clearance: 155 mm / 6.1 in

Seat Height: 835 mm / 32.9 in

Dry Weight: 238 kg / 524 lbs

Wet Weight: 256 kg / 56.43 lbs

Fuel Capacity: 20 Litres / 5.2 US gal / 4.4 Imp gal

Consumption Average: 6.2 L/100 km / 16.2 km/l / 38.2 US mpg / 45.9 Imp mpg

Standing 1/4 Mile: 11.1 sec / 197.9 km/h / 123 mph

Top Speed: 225 km/h / 140 mph

Road Test: Group Test 1985 Motosprint