Ducati 50 SL / 50 SL/1 / 50 SL/1A / 50 SL2A (1966-68) vs Ducati 1000GT Classic (2008) vs Moto Guzzi California III CI injection (1990-)
Comparison technical specifications
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| Make: | Ducati | Ducati | Moto Guzzi |
| Model: | 50 SL / 50 SL/1 / 50 SL/1A / 50 SL2A | 1000GT Classic | California III CI injection |
| Years: | 1966-68 | 2008 | 1990- |
| Engine: | Two-stroke, single cylinder, piston port | Four stroke, 90° “L” twin cylinder, desmodromic 2 valves per cylinder, operated by four rocker arms (two opening rockers and 2 closing rockers) SOHC. Driven by the crankshaft through spur gears, timing belt pulleys and toothed timing belts | Four stroke, V twin, longitudinally mounted, OHV, 2 valve per cylinder |
| Capacity: | 49.7 cc / 3.0cu in | 992 cc / 60.5 cu in | 948.8 cc / 57.8 cu-in |
| Bore x Stroke: | 38.8 x 42 mm | 94 x 71.5 mm | 88 x 78 mm |
| Compression Ratio: | 9.5:1 or 11:1 | 10.0:1 | 9.2:1 |
| Cooling System: | Air cooled | Air cooled | Air cooled |
| Induction: | Dell'Orto SHA 14/12 carburetor | Marelli electronic fuel injection, 45mm throttle body | Digital electronic injection Weber IAW ALFA-N system with electric feeding pump, 36 mm throttle units |
| Ignition: | 6V 18W flywheel magneto, 16-18 | Marelli electronic | Motoplat electronic ignition, Digital computerized electronic Weber IAW ALFA-N system, inductive spark |
| Starting: | Kick | Electric | Electric |
| Max Power: | 3.1 kW / 4.2 hp @ 8600 rpm | 61 kW / 81.8 hp @ 8,000 rpm | 67 hp / 50 kW @ 6850 rpm |
| Clutch: | Wet, multiplate | Wet, multiplate | Twin plate, dry type |
| Transmission: | four Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain, gear ration:15/39 | Shaft |
| Front Suspension: | Telescopic fork | 43 mm Marzocchi upside down fork | Telescopic with preload adjustment |
| Rear Suspension: | Swingarm, twin shocks | Twin shock absorbers, spring preload | Dual Koni shocks 5-way preload |
| Front Brakes: | Drum, 105 mm | 2x 320 mm Semi-floating discs, 4 piston calipers | 2x 300mm discs 2 Brembo piston calipers |
| Rear Brakes: | Drum, 105 mm | Single 245 mm disc, 2 piston caliper | Single 270mm disc Brembo 2 piston calipers |
| Front Tyre: | 2.25 x 19 | 120/70 ZR17 | 110/90 V18 |
| Rear Tyre: | 2.25 x 19 | 180/55 ZR17 | 130/90 V18 |
| Dry Weight: | 58 kg / 128 lbs | 185 kg / 407.8 lbs | 270 kg / 595 lbs |