Yamaha XT 660X (2005) vs Bimota DB4 (1998)
Comparison technical specifications
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| Make: | Yamaha | Bimota |
| Model: | XT 660X | DB4 |
| Years: | 2005 | 1998 |
| Engine: | Four stroke, single cylinder, SOHC, 4 valve | Four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valves per cylinder |
| Capacity: | 659 cc/ 40.2 cu-in | 904cc / 55.2 cub in. |
| Bore x Stroke: | 100 x 84 mm | 92 x 68 mm |
| Compression Ratio: | 10: 1 | 9.2:1 |
| Cooling System: | Liquid cooled | Air cooled |
| Induction: | Fuel injection, 44 mm throttle body | 2x 38mm Mikuni carbs |
| Lubrication: | Dry sump | Wet sump |
| Ignition: | TCI | Electronic inductive |
| Starting: | Electric | Electric |
| Max Power: | 33.8 kW / 48 hp @ 6000 rpm | 58.3 kW / 80 hp @ 7000 rpm |
| Max Torque: | 58.4 Nm / 5.7 kgf-m @ 5250 rpm | 81 Nm / 8.3 kgf-m / 59.7 lb-ft @ 7000 rpm |
| Transmission: | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | 43 mm Telescopic forks, | Telehydraulic fork with 43mm stanchions and preload adjustments |
| Rear Suspension: | Oscillating arm standard Monocross. | Fully adjustable monoshock absorber, swingarm |
| Front Brakes: | Single 320mm disc 4 piston caliper | 2x 320mm discs |
| Rear Brakes: | Single 245mm disc 1 piston caliper | Single 230mm disc |
| Front Tyre: | 120/700-17 | 120/70 ZR17 |
| Rear Tyre: | 160/60-17 | 180/55 ZR17 |
| Rake: | 26.0° | 23° |
| Wheelbase: | 1505 mm / 59.3 in | 1370 mm / 53.9 in. |
| Seat Height: | 875mm / 34.4 in | 800 mm / 31.5 in. |
| Dry Weight: | 173 kg / 318.4 lbs | 165 kg / 363.8 lbs |
| Fuel Capacity: | 15 Litres / 3.9 gal | 20 Litres / 5.3 US gal |