Ducati 125 Sport (1957-60) vs KTM 690 Duke (2008) vs Ducati Supersport S (2019-20)
Comparison technical specifications
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| Make: | Ducati | KTM | Ducati |
| Model: | 125 Sport | 690 Duke | Supersport S |
| Years: | 1957-60 | 2008 | 2019-20 |
| Engine: | Four stroke, single-cylinder, OHC, bevel gear driven | Four stroke, single cylinder, SOHC, 4 valves | Testastretta 11°, L-Twin cylinder, 4 valve per cylinder, Desmodromic |
| Capacity: | 124.4 cc / 7.6 cu in | 653.7 cc / 39.91 cu in | 937 cc / 57.2 cu in |
| Bore x Stroke: | 55.2 x 52 mm | 102 x 80 mm | 94 x 67.5 mm |
| Compression Ratio: | 8.0:1 | 11.8:1 | 12.6:1 |
| Cooling System: | Air cooled | Liquid Cooled | Liquid cooled |
| Induction: | Dell'Orto UB20BS carburetor | Generation Keihin EMS with EPT (Electric Power Throttle) | Electronic fuel injection system, 53 mm throttle bodies with full Ride-by-Wire |
| Ignition: | Battery and coil, 6V 40W generator | Kokusan DC-CDI | Electronic |
| Starting: | Kick | Electric | Electric |
| Max Power: | 7.5 kW / 10 hp @ 8500 rpm | 46 kW / 65 hp @ 7500 rpm | 82 kW / 110 hp @ 9000 rpm |
| Transmission: | 4 Speed | 6 Speed | 6-Speed |
| Clutch: | Wet, multi-plate | APTC multi-disc wet clutch, hydraulically operated | Wet multiplate clutch mechanically operated, self-servo action on drive, slipper action on over-run |
| Final Drive: | Chain | Chain X-Ring 5/8 x 5/16" | Chain; front sprocket 15; rear sprocket 43 |
| Front Suspension: | Hydraulically damped telescopic forks, Marzocci | WP Upside-down forks, 4860 ROMA | Fully adjustable 48 mm usd Öhlins fork |
| Rear Suspension: | Swingarm, dual shocks, 3-way adjustable | WP monoshock, 4618 with Pro-lever deflector | Progressive linkage with adjustable Öhlins monoshock. Aluminium single-sided swingarm |
| Front Brakes: | Drum | Single 320 mm floating disc, radially screwed four-piston brake caliper | 2 x 320 mm Semi-floating discs, radially mounted Monobloc Brembo M4-32 callipers, 4-piston, radial pump with Bosch ABS |
| Rear Brakes: | Drum | Single 240 mm floating disc, single piston caliper | 245 mm disc, 2-piston caliper, Bosch ABS |
| Front Tyre: | 2.50 - 17 CEAT | 120/70 - R17 | Pirelli Diablo Rosso III 120/70 ZR17 |
| Rear Tyre: | 2.75 - 17 CEAT | 160/60 - R17 | Pirelli Diablo Rosso III 180/55 ZR17 |
| Dry Weight: | 100.5 kg / 221 lbs | 148.5 kg / 327 in | 183 kg / 403 lbs |
| Fuel Capacity: | 16 L / 4.2 US gal / 3.5 Imp gal | 13.5 Litres / 3.6 US gal / 3.0 Imp gal | 16 Litres / 4.2 US gal / 3.5 Imp gal |