1981 Ducati 900 SS Technical Analysis & Specification Breakdown
Built around Ducati's classic motorcycle platform, the 1981 Ducati 900 SS utilizes a 864 cc (52.7 cu in) air-cooled v2, four-stroke layout. In factory specification, peak output is rated at 65 HP (47.4 kW) at 7,000 rpm while maximum torque reaches 81 Nm (59.7 lb-ft) at 7,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 75.2 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the 900 SS measures 225 kg (496 lbs) wet (curb), translating to a power-to-weight ratio of 0.29 HP/kg (3.46 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance. The 18-liter (4.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 213 km/h (132 mph).
Within MotoLibrary's Ducati archive, this model family spans 13 indexed model years from 1975 to 1998, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
75.2 HP/L
Power-to-Weight
0.29 HP/kg (3.46 kg/HP)
Standover Height
800 mm (31.5 in)
Engine
Displacement864.0 ccm (52.72 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsV2, four-stroke
Power65.0 HP (47.4 kW)) @ 7000 RPM
Torque81.0 Nm (8.3 kgf-m or 59.7 ft.lbs) @ 7000 RPM
Compression9.5:1
Bore x Stroke86.0 x 74.4 mm (3.4 x 2.9 inches)
Valves/Cylinder2
Fuel ControlDesmodromic valve control
LubricationWet sump forced lubrication with gear pump
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchMultiplate dry/wet clutch, hydraulic
DrivelineO-ring chain final drive
Chain Size525
Performance
Top Speed213.0 km/h (132.4 mph)
Wheels & Brakes
Front Tyre3.50-18
Rear Tyre4.25/85-18
Front Tire Pressure2.3 bar (33 psi)
Rear Tire Pressure2.5 bar (36 psi)
Front BrakesDual disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight188.0 kg (414.5 pounds)
Weight incl.225.0 kg (496.0 pounds)
Power/Weight0.3457 HP/kg
Seat Height800 mm (31.5 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
