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Ducati · 1977–1978

1978 Ducati 500 S Desmo

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1978 Ducati 500 S Desmo

Specifications

Category
Classic
Displacement
497.0 ccm (30.33 cubic inches)
Displacement (cc)
497.00
Engine details
Twin, four-stroke
Power
43.0 HP (31.4 kW)) @ 8000 RPM
Top speed
180.0 km/h (111.8 mph)
Compression
9.6:1
Bore × stroke
78.0 x 52.0 mm (3.1 x 2.0 inches)
Valves/cyl
2.0
Fuel control
Desmodromic valve control
Cooling
Air
Gearbox
5-speed
Transmission
Chain   (final drive)
Front tyre
3.25-18
Rear tyre
3.50-18
Front brakes
Dual disc
Rear brakes
Single disc
Wet weight
186.0 kg (410.1 pounds)
Fuel capacity
19.00 litres (5.02 US gallons)
Auction record
Average sale
Sales
0
Low
High

The 1978 Ducati 500 S Desmo

The 1978 Ducati 500 S Desmo positioned itself as an entry point into Ducati's desmodromic valve system, offering a taste of Bologna engineering philosophy without the complexity or cost of the larger twins. This was a bike that taught riders about Italian motorcycle character while remaining approachable for those stepping up from smaller machines.

With its 497cc single putting out respectable power and weighing in at a manageable 186 kilograms, the 500 S Desmo rewarded smooth riding and mechanical sympathy. The desmodromic valve system meant precise valve control but also required owners who understood that Italian engineering came with maintenance expectations. This wasn't a bike for weekend warriors who ignored service intervals, but rather one that built loyalty among riders who appreciated the mechanical elegance underneath.

The 1978 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1977 example should focus on mileage, service history, and condition rather than spec differences.

This Ducati appealed to riders graduating from Japanese 250s or 400s who wanted something with more soul, even if it meant learning to live with quirks. Today's buyers are typically enthusiasts seeking an affordable entry into classic Ducati ownership or riders who appreciate the purity of a well-engineered single.

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