| Attribute | Value |
| General |
| Production from | 2004 year |
| Make | Yamaha |
| Model | Yamaha XT 660 X Supermotard |
| Category | Super motard |
| Engine and transmission |
| Engine type | Twin, four-stroke |
| Valves per cylinder | Add |
| Fuel system | Add |
| Engine details | Add |
| Displacement | 659 cm³ |
| Power | 34.5 kw |
| Max RPM | Add |
| Fuel consumption | Add |
| Cooling system | Liquid |
| Transmission type,final drive | Add |
| Torque | 58.4 Nm |
| Bore | 100 mm |
| Stroke | 84 mm |
| Gearbox | Add |
| Greenhouse gases | Add |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Emission details | Add |
| Driveline | Add |
| Ignition | Add |
| Clutch | Add |
| Lubrication system | Add |
| Compression | 10.0:1 |
| Exhaust system | Add |
| Chassis |
| Front suspension | Telescopic fork, diameter 43mm |
| Rear suspension | Monocross with linkage |
| Front brakes | Single disc |
| Rear brakes | Single disc |
| Diameter | 245 mm |
| Frame type | Add |
| Front tyre | 120/70-17 |
| Rear tyre | 160/60-17 |
| Seat | Add |
| Wheels | Add |
| Front wheel travel | 200 mm |
| Rear wheel travel | 191 mm |
| Trail | Add |
| Rake (fork angle) | Add |
| Other |
| Battery capacity | Add |
| Starter | Add |
| Color options | |
| Carrying capacity | Add |
| Light | Add |
| Instruments | Add |
| Electrical Voltage | Add |
| Dimensions |
| Wheelbase | 1,485 mm |
| Kerb weight | Add |
| Dry weight | 173 kg |
| Power/weight ratio | 0.1994 |
| Overall height | 1,349 mm |
| Overall length | 2,131 mm |
| Overall width | 860 mm |
| Seat height | 875 mm |
| Alternate seat height | Add |
| Ground clearance | 200 mm |
| Front percentage of weight | Add |
| Rear percentage of weight | Add |
| Performance |
| Top speed | Add |
| Acceleration 0-100 km/h | Add |
| Length | Add |
| Reserve fuel capacity | Add |
| Fuel capacity | Add |
| Oil capacity | Add |
| Width | Add |
| Height | Add |