Yamaha XT 660X (2010) vs Gilera XR2-125 (1990-) vs Yamaha FZ-1 N (2010)
Comparison technical specifications
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| Make: | Yamaha | Gilera | Yamaha |
| Model: | XT 660X | XR2-125 | FZ-1 N |
| Years: | 2010 | 1990- | 2010 |
| Engine: | Four stroke, single cylinder, SOHC, 4 valve | Two stroke, single cylinder, reed valve | Four stroke, transverse four cylinder, DOHC, 5 valve per cylinder |
| Capacity: | 659 cc/ 40.2 cu-in | 124 ccc / 7.6 cu-in | 998 cc / 60.9 cu-in |
| Bore x Stroke: | 100 x 84 mm | 56 x 50.5 mm | 77 X 53.6 mm |
| Compression Ratio: | 10: 1 | 13.0;1 | 11.5:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled |
| Induction: | Fuel injection, 44 mm throttle body | Dell'Orto premix | Fuel injection |
| Ignition: | TCI | Electric ignition with capacitive output | Digital TCI: Transistor Controlled Ignition with 32-bit ECU |
| Starting: | Electric | Kick | Electric |
| Max Power: | 33.8 kW / 48 hp @ 6000 rpm | 24 hp / 18 kW @ 9250 rpm | 146.84 hp / 108 kW @ 11000 rpm |
| Max Torque: | 58.4 Nm / 5.7 kgf-m @ 5250 rpm | 1.5 kgf-m @ 10500 rpm | 106 Nm /10.5 kgf-m / 76.7 ft-lb @ 8000 rpm |
| Transmission: | 5 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain | Chain | O-ring chain |
| Front Suspension: | 43 mm Telescopic forks, | Paioli upside down forks, 230mm wheel travel | Telescopic upside forks, |
| Rear Suspension: | Oscillating arm standard Monocross. | Boge single shock | Link-type swingarm, |
| Front Brakes: | Single 320mm disc 4 piston caliper | Single disc | 2x 320mm discs 4 piston calipers |
| Rear Brakes: | Single 245mm disc 1 piston caliper | Single disc | Single 245mm disc 1 piston caliper |
| Front Tyre: | 120/700-17 | 2.75-21 | 120/70 ZR17 |
| Rear Tyre: | 160/60-17 | 4.10-17 | 190/50 ZR17 |
| Wet Weight: | 186 kg / 410.1 lbs | 141 kg / 310.8 lbs | 221 kg / 487 lbs |
| Fuel Capacity: | 15 Litres / 3.9 gal | 22 Litres / 5.8 US gal | 18 Liters / 4.76 US gal |