Ducati 500GTL (1977-78) vs Ducati 900 SS (1979)
Comparison technical specifications
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| Make: | Ducati | Ducati |
| Model: | 500GTL | 900 SS |
| Years: | 1977-78 | 1979 |
| Engine: | Four stroke, parallel twin cylinder, SOHC, chain driven, 2 valve per cylinder | Four stroke, 90°“L”twin cylinder, SOHC, 2 valves per cylinder, bevel gear driven |
| Capacity: | 496.9 cc / 30.2 cu in | 864 cc / 52.7 cu in |
| Bore x Stroke: | 78 x 52 mm | 86 x 74.4 mm |
| Compression Ratio: | 9.6:1 | 9.4:1 |
| Cooling System: | Air cooled | Air cooled |
| Induction: | Dell'Orto PHF30BS/BD | 2 x Dell'Orto PHF 32C carburetors |
| Ignition: | Points and coil | Electronic |
| Starting: | Kick | Electric |
| Battery: | Yuasa Y50-N18L-A1, 12V 18Ah | Yuasa B68 36Ah |
| Max Power: | 25.7 kW / 35 hp @ 6500 rpm | 47.8 kW / 65 hp @ 7500 rpm |
| Clutch: | Wet, multiplate | Wet, multiplate |
| Transmission: | 5 Speed | 5 Speed |
| Primary Drive Ratio: | 2.125:1 (32/68) | 2.187:1 (32/70) |
| Gear Ratios: | 1st 2.500 / 2nd 1.714 / 3rd 1.333 / 4th 1.074 / 5th 0.900:1 | 1st 2.237 / 2nd 1.562 / 3rd 1.203 / 4th 1.000 / 5th 0.887 |
| Final Drive Ratio: | 2.923:1 (13/38) | 2.400:1 (15/36) |
| Final Drive: | Chain | Chain |
| Front Suspension: | 35 mm Paioli telescopic fork | Marzocchi telescopic fork |
| Rear Suspension: | Swing arm, 2 x Marzocchi shocks, 3-way adjustable | Marzocchi 330 mm dual shocks, 3-way adjustable |
| Front Brakes: | 2 x 256 mm Brembo discs | 2 x 280 mm Disc, 1 piston caliper |
| Rear Brakes: | Single 260 mm Brembo disc | Single 280 mm disc |
| Dimensions: | Length: 2050 mm / 80.7 in Width: 760 mm / 29.9 in Height: 1060 mm / 41.7 in | Length: 2260 mm / 88.9 in Width: 700 mm / 27.6 in Height: 1280 mm / 50.4 in |
| Wheelbase: | 1400 mm / 55.1 in | 1550 mm / 61.0 in |
| Seat Height: | 760 mm / 29.9 in | 740 mm / 29.1 in |
| Dry Weight: | 183 kg / 403 lbs | 216 kg / 476 lbs |
| Wet Weight: | 196 kg / 432 lbs | 224 kg / 494 lbs |
| Fuel Capacity: | 19 L / 5.0 US gal / 4.2 Imp gal | 15 L / 4.0 US gal / 3.3 Imp gal |
| Top Speed: | 175 km/h / 109 mph | 205 km/h / 127 mph |