Comparison of Yamaha XT 660 R 2007 and Yamaha XT 660 X 2006 [S]ave
| Attribute |  Yamaha XT 660 R 2007 × |  Yamaha XT 660 X 2006 × |
|---|---|---|
| General | ||
| Production from (year) | 2007 | 2006 |
| Make | Yamaha | Yamaha |
| Model | Yamaha XT 660 R | Yamaha XT 660 X |
| Category | Enduro / offroad | Enduro / offroad |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Fuel system | Injection | Injection |
| Displacement (cm³) | 660 | 660 |
| Power (kw) | 34.5 | 34.5 |
| Cooling system | Liquid | Liquid |
| Transmission type,final drive | Chain | Chain |
| Torque (Nm) | 60 | 58.4 |
| Bore (mm) | 100 | 100 |
| Stroke (mm) | 84 | 84 |
| Gearbox | 5-speed | - |
| Fuel control | Single Overhead Cams (SOHC) | Single Overhead Cams (SOHC) |
| Ignition | - | TCI |
| Clutch | Wet, multiple-disc coil spring | Wet, multiple disc |
| Lubrication system | Wet sump | Dry sump |
| Compression | - | 10.0:1 |
| Chassis | ||
| Front suspension | Telescopic forks | Telescopic fork |
| Rear suspension | Swingarm (monocross) | Monocross with linkage |
| Front brakes | Single disc | Single disc |
| Rear brakes | Single disc | Single disc |
| Diameter (mm) | 245 | 245 |
| Frame type | Steel tube, diamond shaped | Front suspension system |
| Front tyre | 90/90-M21 | 90/90-21 |
| Rear tyre | 130/80-M17 | 130/80-17 |
| Front wheel travel (mm) | 225 | 225 |
| Rear wheel travel (mm) | 200 | 160 |
| Other | ||
| Starter | Electric | Electric |
| Dimensions | ||
| Wheelbase (mm) | 1,505 | 1,505 |
| Dry weight (kg) | 172 | 165 |
| Power/weight ratio | 0.2006 | 0.2091 |
| Overall height (mm) | 1,230 | 1,230 |
| Overall length (mm) | 2,240 | 2,240 |
| Overall width (mm) | 845 | 850 |
| Seat height (mm) | 865 | 865 |
| Ground clearance (mm) | 210 | 210 |
| Performance | ||
| Fuel capacity (l) | 15 | 15 |
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