Velocette Viper (1955-68) vs Ducati 749 Dark (2006)
Comparison technical specifications
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| Make: | Velocette | Ducati |
| Model: | Viper | 749 Dark |
| Years: | 1955-68 | 2006 |
| Engine: | Four stroke, single cylinder | Four stroke, 90°“L”twin cylinder, DOHC, desmodromic 4 valve per cylinder. |
| Capacity: | 349 cc / 30.5 cub in | 748.4 cc / 45.7 cu in |
| Bore x Stroke: | 72 x 86 mm | 90 x 58.8 mm |
| Compression Ratio: | 8.0:1 | 11.7:1 |
| Cooling System: | Air cooled | Liquid cooled |
| Lubrication: | Wet sump | Wet sump |
| Exhaust: | Single | Single steel muffler with catalytic converter |
| Spark Plug: | KLG FE100 / Champion N3 / NGK B8ES, Lodge 3HLN | Champion, RA6HC, NGK CR9VX |
| Ignition: | Belt driven dynamo, after 1962: Lucas system | Digital CDI |
| Starting: | Kick start | Electric |
| Max Power: | 25 kW / 28 hp @ 7000 rpm | 79.4 kW / 108 hp @ 10000 rpm |
| Clutch: | Dry, three-plate | Dry multiplate with hydraulic control |
| Transmission: | 4 Speed constant mesh, close ratio | 6 Speed |
| Final Drive: | Chain | Chain |
| Wheelbase: | 1353 mm / 53.25 in | 1420 mm / 55.9 in |
| Front Suspension: | Telescopic fork with hydraulic compression and rebound damping | Showa 43mm fully-adjustable upside-down fork with TiN |
| Rear Suspension: | Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling, adjustable | Progressive linkage with fully-adjustable Sashs monoshock |
| Front Brakes: | 7.5 x 1.5 in., drum | 2 x 320mm Discs, semi-floating, 4 piston calipers |
| Rear Brakes: | 7 x 1 in., drum | Single 245 mm disc, 2 piston caliper |
| Front Wheel: | WM2 x 19 | New Y-shaped 5 spoke design light alloy, 3.50 x 17 |
| Rear Wheel: | WM2 x 19 | New Y-shaped 5 spoke design light alloy, 5.50 x 17 |
| Front Tyre: | 3.25 x 19 in | 120/70 ZR17 |
| Rear Tyre: | 3.25 x 19 in | 180/55 ZR17 |
| Rake: | 27° | 24.5° |
| Fuel Capacity: | 13.6 L / 3.6 US gal | 15.5 L / 4.1 US gal / 3.4 Imp gal |
| Dry Weight: | 165 kg / 364 lbs | 188 kg / 416 lbs |
| Top Speed: | 91 mph | 240 km/h / 149 mph |