1977 Ducati 500 S Desmo

Specifications
- Category
- Sport
- 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)
The 1977 Ducati 500 S Desmo
The 1977 Ducati 500 S Desmo sits in Ducati's mid-displacement sport bike range, offering desmodromic valve technology in a more accessible package than the brand's larger twins. This is a proper sport bike that rewards committed riding with sharp handling and distinctive Italian character. The 497cc twin delivers its power smoothly up to the 8000 rpm peak, making it well-suited for spirited canyon runs and track days where technique matters more than raw horsepower. At 186 kg wet, it's light enough to flick through corners but substantial enough to feel planted at highway speeds. The 19-liter tank provides decent range for longer rides, though the aggressive riding position makes this more of a weekend warrior than a daily commuter.
The 1977 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1976 example should focus on mileage, service history, and condition rather than spec differences. This 1977 Ducati 500 S Desmo appeals to riders stepping up from smaller bikes who want genuine Italian sport bike DNA without the intimidation factor of a 750 or 900. It's also popular with vintage racing enthusiasts who appreciate the desmodromic technology and nimble chassis dynamics.
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