Ducati 620 Sport (full fairing) (2003) vs Kawasaki Ninja 125 (2019) vs Triumph Street Triple 765S (2017) vs Suzuki Boulevard C90 B.O.S.S (2017-18) vs Honda CB 650 (1978-79)
Comparison technical specifications
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| Make: | Ducati | Kawasaki | Triumph | Suzuki | Honda |
| Model: | 620 Sport (full fairing) | Ninja 125 | Street Triple 765S | Boulevard C90 B.O.S.S | CB 650 |
| Years: | 2003 | 2019 | 2017 | 2017-18 | 1978-79 |
| Engine: | Four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valve per cylinder, belt driven | Four stroke, single cylinder, DOCH, 4 valve | Four stroke, in-line 3-cylinder, DOHC, 4 valve per cylinder | Four stroke, 54° V-twin, SOHC, 3 valves per cylinder | Four stroke, transverse four cylinder, SOHC, 2 valves per cylinder. |
| Capacity: | 618 cc / 37.7 cu in | 125 cc / 7.6 cu in | 765 cc / 46.6 cu-in | 1462 cc / 89.2 cu-in | 626.8 cc / 38.2 cu-in |
| Bore x Stroke: | 80 x 61.5 mm | 58.0 x 47.2mm | 78 x 53.4 mm | 96 x 101 mm | 59.8 x 55.8 mm |
| Compression Ratio: | 10.5:1 | 11.7:1 | 12.65:1 | 9.5:1 | 9.0:1 |
| Cooling System: | Air cooled | Air cooled | Liquid-cooled | Liquid cooled | Air cooled. |
| Induction: | Marelli CPU 5.9M electronic fuel injection, 45 mm throttle body | Fuel injection (ø28 x 1) | Multipoint sequential electronic fuel injection with SAI. Electronic throttle control | Fuel injected | 4x 26mm Keihin carburetors |
| Ignition: | Marelli electronic | B&C (TCBI, B. P&EL. ADV.) | Digital - inductive type | Digital transistorized | Transistorized |
| Starting: | Electric | Electric | Electric | Electric | Electric |
| Max Power: | 45 kW / 61hp @ 8750 rpm | 11.0 kW / 14.8 hp @ 10,000 rpm | 111 hp / 83kW @ 11,250 rpm | 49.2 kW / 66 hp @ 4800 rpm | 63 hp / 46.9 kW @ 9000 rpm |
| Max Torque: | 54 Nm / 5.5 kgf-m /39.8ft-lb @ 6500 rpm | 11.7 Nm / 8.6 lb-ft @ 7,700 rpm | 53.8 lb-ft / 73 Nm @ 9,100 rpm | 115 Nm /11.7 kgf-m / 84.8 ft-lbs @ 2800 rpm | 51.5 Nm / 38 ft-lb @ 8000 rpm |
| Transmission: | 5 Speed | 6 Speed, return shift | 6 Speed, close ratio | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | O ring chain | Shaft | Chain |
| Front Suspension: | Marzocchi 43 mm upside-down fork | 37mm Telescopic Fork | Showa 41 mm upside down separate function forks (SFF) | Telescopic, coil springs, oil damped | Centre axle coil spring forks |
| Rear Suspension: | Progressive cantilever linkage with fully adjustable, Sachs Boge monoshock with position-sensitive damping | Uni Track Swingarm | Showa piggyback reservoir monoshock, stepped preload adjuster | Link type, coil spring, oil damped | Dual Showa dampers. adjustable spring preload. |
| Front Brakes: | 2x 320 mm Discs, 4 piston calipers | Single 290mm Disc, Dual Piston Calipers | 2 x 310 mm floating discs, Nissin 2-piston sliding calipers | Dual 300 mm discs, 4 piston caliper | Single 275mm discs 1 piston calipers |
| Rear Brakes: | Single 245 mm disc, 2 piston caliper | Single 220mm Disc | Single 220 mm fixed disc, Brembo single piston sliding calliper | Single 180 mm disc, 2 piston caliper | 180mm Drum |
| Front Tyre: | 120/70 ZR17 | 100/80-17M/C 52S | 120/70 ZR17 Pirelli Diablo Rosso Corsa | 130/80-17M/C 65H, tubeless | 3.50-19 |
| Rear Tyre: | 160/60 ZR17 | 130/70-17M/C 62S | 180/55 ZR17 Pirelli Diablo Rosso Corsa | 200/60-16M/C 79H, tubeless | 4.50-17 |
| Fuel Capacity: | 16 L / 4.2US gal / 3.5 Imp gal | 11 Litres / 2.9 US gal | 17.4 Litres / 4.6 US gal / 3.8 Imp gal | 18 Litres / 4.8 US gal | 18 Litres / 4.7 US gal |