Suzuki GSX400F Katana (1981)

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The Suzuki GSX400F Katana is a 1981 motorcycle with a four-stroke, transverse four-cylinder, DOHC engine with 4 valves per cylinder. It has a capacity of 398cc and a compression ratio of 10.2:1. The bike is air-cooled and has a wet sump lubrication system. It has a 6-speed transmission with a wet, multiplate clutch and a chain drive final drive. The front suspension is a telescopic fork with oil damping, and the rear suspension is a swingarm with dual shocks, oil damping, and spring 5-way adjustability. Both front and rear brakes are disk brakes, with the front having two disks, while the rear has only one. The bike has a maximum power of 41.3 hp at 10500 rpm and a maximum torque of 30.2 Nm at 8500 rpm. The Suzuki GSX400F Katana has a length of 2105 mm, a width of 750 mm, and a height of 1135 mm. It has a wheelbase of 1415 mm and a ground clearance of 165 mm. The dry weight of the bike is 179 kg.

Technical specifications:

Make Model: Suzuki GSX 400F Katana

Year: 1981


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 degrees (left and right)
Caster: 63 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

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