Kawasaki Z 750R (2011-12) vs Yamaha XT 660X (2007)
Comparison technical specifications
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| Make: | Kawasaki | Yamaha |
| Model: | Z 750R | XT 660X |
| Years: | 2011-12 | 2007 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder. | Four stroke, single cylinder, SOHC, 4 valve |
| Capacity: | 748 cc / 45.6 cu-in | 659 cc/ 40.2 cu-in |
| Bore x Stroke: | 68.4 x 50.9 mm | 100 x 84 mm |
| Cooling System: | Liquid cooled | Liquid cooled |
| Compression Ratio: | 11.3:1 | 10: 1 |
| Induction: | Fuel injection: ø32 mm x 4 (Keihin) with oval sub-throttles | Fuel injection, 44 mm throttle body |
| Ignition: | Digital | TCI |
| Starting: | Electric | Electric |
| Max Power: | 77.7 kW / 106 hp @ 10500 rpm | 33.8 kW / 48 hp @ 6000 rpm |
| Max Torque: | 78 Nm / 8.0 kg-fm @ 8300 rpm | 58.4 Nm / 5.7 kgf-m @ 5250 rpm |
| Clutch: | Multiple wet plate manual | Wet, multiple-disc coil spring |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain |
| Frame: | Tubular backbone (with engine sub-frame), high-tensile steel | Steel tubular diamond frame with dual tank rails |
| Front Suspension: | 41 mm inverted fork with rebound damping and spring preload adjustability, 120mm wheel travel | 43 mm Telescopic forks, |
| Front Wheel Travel: | 120 mm / 4.7 in | 225 mm / 8.8 in |
| Rear Suspension: | Bottom-Link Uni-Trak, gas-charged shock with piggyback reservoir Rebound damping: Stepless Spring preload: Stepless | Oscillating arm standard Monocross. |
| Rear Wheel Travel: | 134 mm / 5.2 in | 200 mm / 7.9 in |
| Front Brakes: | 2x 300mm discs 4 piston caliper | Single 320mm disc 4 piston caliper |
| Rear Brakes: | Single 200mm disc 1 piston caliper | Single 245mm disc 1 piston caliper |
| Front Tyre: | 120/70 -17 | 120/700-17 |
| Rear Tyre: | 180/55 –17 | 160/60-17 |
| Trail: | 103 mm / 4.1 in | 94 mm / 3.7 in |
| Dimensions: | Length 2085 mm / 82.1 in Width 805 mm / 31.7 in Height 1100 mm / 43.3 in | Height 1170 mm / 461 in Length 2175 mm / 85.6 in Width: 860 mm / 33.9 in |
| Wheelbase: | 1440 mm / 56.7 in | 1505 mm / 59.3 in |
| Seat Height: | 815 mm / 32.1 in | 875mm / 34.4 in |
| Ground Clearance: | 155 mm / 6.1 in | 210 mm / 8.3 in |
| Dry Weight: | 207.0 kg / 456.4 lbs | 173 kg / 318.4 lbs |
| Fuel Capacity: | 18.5 Litres / 4.8 US gal | 15 Litres / 3.9 gal |