Ducati 400 SS (1991-98)

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The Ducati 400SS Junior motorcycle was produced from 1991 to 1998. It has a four-stroke, 90-degree L twin-cylinder, SOHC, desmodromic 2-valve per cylinder engine with a capacity of 398cc. The compression ratio is 10:1 with a Mikuni B79 carburetor for induction. The bike has a max power of 30.9 kW/42 hp at 10,000 rpm and a max torque of 35.2 Nm/3.6 kgf-m/26 ft-lb at 8,500 rpm. It has a 6-speed transmission with a primary drive ratio of 2.264:1 and a final drive ratio of 3.210:1 with a chain final drive. The Marzocchi inverted telescopic fork, 40USD/E, is used for front suspension and the Cantilever swingarm, Marzocchi PBS1R monoshock, and preload and rebound damping are used for rear suspension. The bike has a single 320mm disc for front brakes and a single 245mm disc for the rear. The front tire is 130/60 VR17 and the rear tire is 160/60 VR17. The bike has a length of 2020mm/79.5in, a width of 730mm/28.7in, a height of 1110mm/43.7in, a wheelbase of 1410mm/55.5in, and a seat height of 750mm/29.5in. The dry weight of the bike is 173 kg/381 lbs and has a fuel capacity of 17L/4.5 US gal/3.7 Imp gal. The bike has a top speed of 180 km/h/112 mph.

Technical specifications:

Make Model: Ducati 400SS Junior

Year: 1991 – 98


Engine: Four stroke, 90 degrees L twin cylinder, SOHC, desmodromic 2 valve per cylinder.
Capacity: 398 cc / 24.3 cu in
Bore x Stroke: 70.5 x 51 mm
Compression Ratio: 10.0:1
Cooling System: Air cooled
Induction: Mikuni B79 carburetor
Spark Plugs: Champion L82YC (from 1994: RL82Y)
Ignition: Kokusan electronic
Battery: 12V 16Ah
Starting: Electric
Max Power: 30.9 kW / 42 hp @ 10000 rpm
Max Torque: 35.2 Nm / 3.6 kgf-m / 26 ft-lb @ 8500 rpm
Transmission: 6 Speed
Primary Drive Ratio: 2.264:1 (34/77)
Gear Ratios: 1 st 3.071 / 2nd 2.111 ./ 3rd 1.590 / 4th 1.280 / 5th 1.074 / 6th 0.931:1

Final Drive Ratio: 3.210:1 (14/45)
Final Drive: Chain
Front Suspension: Marzocchi inverted telescopic fork, 40USD/E
Rear Suspension: Cantilever swingarm, Marzocchi PBS1R monoshock, preload and rebound damping
Front Brakes: Single 320 mm disc
Rear Brakes: Single 245 mm disc
Front Tyre: 130/60 VR17
Rear Tyre: 160/60 VR17
Dimensions: Length: 2020 mm / 79.5 in Width: 730 mm / 28.7 in Height: 1110 mm / 43.7 in
Wheelbase: 1410 mm / 55.5 in
Seat Height: 750 mm / 29.5 in
Dry Weight: 173 kg / 381 lbs
Fuel Capacity: 17 L / 4.5 US gal / 3.7 Imp gal
Top Speed: 180 km/h / 112 mph

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