Benelli 650 Tornado S2 (1973-74) vs Benelli 500 Quattro (1974-75)
Comparison technical specifications
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| Make: | Benelli | Benelli |
| Model: | 650 Tornado S2 | 500 Quattro |
| Years: | 1973-74 | 1974-75 |
| Engine: | Parallel twin cylinders, four stroke, OHV, 2 valves per cylinder | Four stroke, transverse four cylinders, 2 valves per cylinder, SOHC |
| Capacity: | 642.8 cc / 39.2 cu in | 498 cc / 30.4 cu in |
| Bore x Stroke: | 84 x 58 mm | 56 x 50.6 mm |
| Compression Ratio: | 8.0:1 | 10.2:1 |
| Cooling System: | Air cooled | Air cooled |
| Induction: | 2 x Dell'Orto VHB 29 carbs | 4 x 22mm Dell'Orto carbs |
| Starting: | Electric and kick start | Electric and kickstart |
| Max Power: | 38.8 kW / 52 hp @ 7200 rpm | 32.8 kW / 45 hp @ 9400 rpm |
| Transmission: | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Marzocchi tele-hydraulic forks | Telescopic forks |
| Rear Suspension: | Swinging arm, adjustable shocks | Pivoted rear fork 5-way spring preload |
| Front Brakes: | Drum, 4 leading shoe | Drum |
| Rear Brakes: | Drum | Drum |
| Front Tyre: | 3.50 -18 | 3.25-18 |
| Rear Tyre: | 4.00 -18 | 4.10-18 |
| Dry Weight: | 210 kg / 463 lbs | 200 kg / 440 lbs |
| Fuel Capacity: | 17 L / 4.5 US gal | 19 Litres / 5.02 US gal |