Suzuki GSX1100SX Katana Prototype (1992)

The Suzuki GSX1100SX Katana Prototype motorcycle was created in 1979 and features a four-stroke, transverse, four-cylinder engine with a capacity of 1074 cc. It has a compression ratio of 9.5:1, a wet sump lubrication system, and 4 valves per cylinder. The bike has an air-cooled system and is equipped with a dual-element air cleaner. The ignition is transistorized, and the spark plug is either an NGK D8EA or a DR8ES-L depending on the model, with a gap between 0.6-0.7 mm. The battery is a 12V 50.4 kC (14 Ah)/10HR type YB14L-A2, and the bike has an electric starter. The maximum power of the bike is 83.9 kW, with a maximum torque of 97.1 Nm. It has a wet multi-plate clutch and five-speed transmission, with a chain final drive. The frame is a steel, double-cradle design, with telescopic front suspension and dual shock oil-damped rear suspension. The front brakes consist of 2 x 275 mm discs with 2-piston calipers, while the rear brake has a single 275 mm disc with a 1-piston caliper. The front and rear tires are respectively 3.5 V19 and 4.50 V17, and the bike has a top speed of 225 km/h. The dimensions of the bike are 2245 mm in length, 870 mm in width, 1190 mm in height, and 1520 mm in wheelbase, with a wet weight of 243 kg.

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Technical specifications:

Make Model: Suzuki GSX 1100SX Katana Prototype

Model: 1979

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

Capacity: 1074 cc / 65.5 cu in

Bore x Stroke: 72 x 66 mm

Cooling System: Air cooled

Compression Ratio: 9.5:1

Air Cleaner: Dual element (Paper and polyurethane)

Lubrication: Wet sump

Oil Capacity: 3.2 L / 3.4 US qt / 2.8 Imp qt

Induction: 4 x Mikuni BS34SS

Ignition: Transistorized

Ignition Timing: 15 o BTDC below 1500 rpm / 32 o BTDC above 2350 rpm

Spark Plug: NGK D8EA (in E-01,24,25,30,34), NGK DR8ES-L (the others) – gap 0.6-0.7 mm (0.024-0.028 in)

Battery: 12V 50.4 kC (14 Ah)/10HR – type YB14L-A2

Generator: Three-phase A.C. generator

Starting: Electric

Max Power: 83.9 kW / 111 hp / @ 9500 rpm

Max Torque: 97.1 Nm / 9.9 kgf-m / 70.9 lb-ft @ 6500 rpm

Clutch: Wet multi-plate

Transmission: 5 Speed

Final Drive: Chain, Daido D.I.D 630YL, 96 links

Primary Reduction: 1.775:1 (87/49)

Final Reduction: 2.800:1 (42/15)

Gear Ratio: 1st 2.500 (35/15) / 2nd 1.777 (32/18) / 3rd 1.380 (29/21) / 4th 1.125 (27/24) / 5th 0.961 (25/26)

Frame: Steel, double cradle frame

Front Suspension: Telescopic, oil damped, spring 4-way adjustable with anti-dive

Front Wheel Travel: 150 mm / 5.91 in

Rear Suspension: Dual shock oil damped, damper 4-way, spring 5-way adjustable

Rear Wheel Travel: 109 mm / 4.29 in

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

Rear Brakes: Single 275 mm disc, 1 piston caliper

Front Tyre: 3.50 – V19

Rear Tyre: 4.50 – V17

Rake: 30 degrees

Trail: 118 mm / 4.65 in

Dimensions: Length: 2245 mm / 88.4 in Width: 870 mm / 34.3 in Height: 1190 mm / 46.9 in

Wheelbase: 1520 mm / 59.8 in

Turning Radius: 3.5 m / 11.5 ft

Wet Weight: 243 kg / 535 lbs

Top Speed: 225 km/h / 140 mph