Ducati 900SS (1991)

Ducati 900SS (1991)

The 1991 Ducati 900SS is a masterclass in engineering and design, blending heritage with innovation to create an unparalleled riding experience.

At its heart lies a two-valve, air-and-oil-cooled engine, which may seem old-fashioned by today’s standards but unleashes a raw, emotive power delivery that’s impossible to ignore. The 900SS’s lineage stretches back to the early 1980s, where it drew inspiration from the lightweight, minimalist frame of the TT2 Formula 2 competition bike.

With its triangulated swing arm and cantilevered rear shock, this Ducati exudes a sense of agility and responsiveness that’s simply intoxicating. The result is a machine that rewards skillful riding with razor-sharp handling and a connection to the road that few other bikes can match.

The 1991 900SS may not have been built from scratch, but it embodies everything that makes Ducati a byword for passion and performance. It’s a testament to the company’s unwavering commitment to innovation and its ability to distill the essence of motorcycling into a single, sublime package.

Key Specifications

Engine TypeFour stroke, 90Ltwin cylinder, SOHC, desmodromic 2 valves per cylinder, belt driven
Engine Capacity904 cc / 55.2 cu in
Max Power61.8 kw / 84 hp
Max Torque84 Nm / 8.6 kgf-m / 62 ft-lb @ 6400 rpm
Fuel Tank Capacity17.5 L / 4.6 US gal / 3.8 Imp gal
Weight (Wet/Kerb)424 lbs / 192.5 kg
Seat Height30.7 inches / 780 mm
Ducati 900SS (1991)

All Specifications

Make & Model

ModelDucati 900SS
Year1991

Engine

Engine TypeFour stroke, 90Ltwin cylinder, SOHC, desmodromic 2 valves per cylinder, belt driven
Displacement904 cc / 55.2 cu in
Bore x Stroke92 x 68 mm
Compression Ratio9.2:1
Max Horsepower61.8 kw / 84 hp
Max Torque84 Nm / 8.6 kgf-m / 62 ft-lb @ 6400 rpm
Engine Management SystemMikuni BDST 38-B67
Cooling SystemAir cooled

Performance

Top Speed219.4 km/h / 136.3 mph

Transmission

ClutchDry, multiplate
Gearbox6 Speed
Primary Drive Ratio2.000:1 (31/62)
Gear Ratios1st 2.466 / 2nd 1.764 / 3rd 1.350 / 4th 1.091 / 5th 0.958 / 6th 0.857:1
Final DriveChain

Electrical & Electronics System

Battery12V 16Ah
StarterElectric

Chassis & Suspension

Front Suspension41 mm Showafully adjustable inverted fork
Rear SuspensionProgressive type with adjustable Showa GD monoshock
Rake25o
Trail104 mm / 4.1 in

Wheels & Brakes

Front Tire Size120/70-17
Rear Tire Size170/60-17
Front Brakes2 x 320 mm discs
Rear BrakesSingle 245 mm disc

Dimension & Weights

Overall Length2020 mm / 79.5 in
Overall Width710 mm / 28.0 in
Overall Height1110 mm / 43.7 in
Seat Height30.7 inches / 780 mm
Wheelbase55.5 inches / 1410 mm
Fuel Tank Capacity17.5 L / 4.6 US gal / 3.8 Imp gal
Wet (kerb/curb) Weight424 lbs / 192.5 kg
Dry Weight183 kg / 403 lbs

Features

  • Air-and-oil-cooled, two-valve engine
  • 90-degree Y-twin configuration
  • 904cc displacement
  • 92mm bore and 68mm stroke
  • 9.2:1 compression ratio
  • Desmodromically actuated valves
  • Oil paired rocker arms for valve operation
  • Two valves per cylinder
  • Belt-driven cams
  • Triangulated swing arm design
  • Cantilevered rear shock with no rising-rate linkage
  • Lightweight, minimalist frame of straight chrome-moly tubes
  • Solidly mounted engine completes the structure
  • Six-speed transmission
  • Weber 44 DCNF automotive-style carburetor (glitch-troubled)
  • Air-and-oil-cooled powerplant shares bottom-end with liquid-cooled 906 Paso
Ducati 900SS (1991)
Ducati 900SS (1991)

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