Suzuki GSX400F (1983-84)

The Suzuki GSX 400F Katana is a motorcycle model produced in 1983-84. It features a four stroke, transverse four cylinder, DOHC engine with 4 valves per cylinder and a capacity of 398 cc. The compression ratio is 10.2:1 and it has a cooling system of air cooled lubrication. The bike is powered by 4 Mikuni BS26SS carburetors and it has fully transistorised ignition. The electric starting is backed up by a 12V, 12Ah battery, and the spark plug is NGK D8EA or NIPPON DENSO X24ES-U.

The GSX 400F Katana reaches a maximum power of 30.8 kW / 41.3 hp at 10500 rpm with a maximum torque of 30.2 Nm / 3.1 kgf-m / 22.3 lb-ft at 8500 rpm. The bike has a wet, multiplate clutch and a 6-speed transmission. The final drive is a chain, DAIDO DID50UB, with 104 links. The motorcycle has a telescopic fork, oil-dampened suspension in the front and a swingarm, dual shocks, oil-dampened, spring 5-way adjustable suspension in the rear.

The GSX 400F Katana’s front brakes consist of 2 discs while the rear has a single disc. The front and rear tires are respectively 3.25-S19 4PR and 3.75-S18 4PR. It has a steering angle of 42 degrees (left and right), a caster of 63 degrees, and a trail of 100 mm / 3.9 in. The motorcycle is 2105 mm / 82.9 in in length, 750 mm / 29.5 in in width, and 1135 mm / 44.7 in in height. The wheelbase is 1415 mm / 55.7 in with a ground clearance of 165 mm / 6.5 in. The seat height is 780 mm / 30.7 in with a turning radius of 2.3 m / 7.5 ft. The bike weighs in at 179 kg / 395 lbs when dry.

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Technical specifications:

Make Model: Suzuki GSX 400F Katana

Year: 1983-84

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

Capacity: 398 cc / 24.3 cu in

Bore x Stroke: 53 x 45.2 mm

Compression Ratio: 10.2:1

Cooling System: Air cooled

Lubrication System: Wet sump

Induction: 4 x Mikuni BS26SS carburetors

Ignition: Fully transistorised

Starting: Electric

Battery: 12V, 12Ah

Spark Plug: NGK D8EA, NIPPON DENSO X24ES-U

Max Power: 30.8 kW / 41.3 hp @ 10500 rpm

Max Torque: 30.2 Nm / 3.1 kgf-m / 22.3 lb-ft @ 8500 rpm

Clutch: Wet, multiplate

Transmission: 6 Speed

Final Drive: Chain, DAIDO DID50UB, 104 links

Primary Reduction: 2.300 (92/40)

Final Reduction: 2.866 (43/15)

Gear Ratios: 1st 3.166 (38/12) / 2nd 2.125 (34/16) / 3rd 1.631 (31/19) / 4th 1.333 (28/21) / 5th 1.173 (27/23) / 6th 1.083 (26/24)

Front Suspension: Telescopic fork, oil dampened

Front Wheel Travel: 150 mm / 5.9 in

Rear Suspension: Swingarm, dual shocks, oil dampened, spring 5-way adjustable

Rear Wheel Travel: 107 mm / 4.2 in

Front Brakes: 2 x Discs

Rear Brakes: Single disc

Front Tyre: 3.25-S19 4PR

Rear Tyre: 3.75-S18 4PR

Steering Angle: 42~A degrees (left and right)

Caster: 63~A degrees

Trail: 100 mm / 3.9 in

Dimensions: Length: 2105 mm / 82.9 inWidth: 750 mm / 29.5 in Height: 1135 mm / 44.7 in

Wheelbase: 1415 mm / 55.7 in

Ground Clearance: 165 mm / 6.5 in

Seat Height: 780 mm / 30.7 in

Turning Radius: 2.3 m / 7.5 ft

Dry Weight: 179 kg / 395 lbs