| MODEL | YAMAHA XT 660X 2014 |
| Year | 2014 |
| Engine Type | Four stroke, single cylinder, SOHC, 4 valve |
| Displacement / Capacity | 659 cc / 40.2 cu in |
| Bore X Stroke | 100 x 84 mm |
| Compression Ratio | 10:1 |
| Cooling System | Liquid cooled |
| Max Power | 33.8 kW / 48 hp @ 6000 rpm |
| Max Torque | 58.4 Nm / 5.7 kgf-m @ 5250 rpm |
| Ignition | TCI |
| Induction | Fuel injection, 44 mm throttle body |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Dry sump |
| Gear Box | 5 speed |
| Clutch | Wet, multiple-disc, coil spring |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel tubular diamond frame with dual tank rails |
| Front Suspension | 43 mm telescopic forks, 225 mm / 8.8 in wheel travel |
| Rear Suspension | Oscillating arm, Monocross monoshock, 200 mm / 7.9 in wheel travel |
| Front Brakes | Single 320 mm disc, 4-piston caliper |
| Rear Brakes | Single 245 mm disc, 1-piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2175 mm / 85.6 in |
| Overall Width | 860 mm / 33.9 in |
| Overall Height | 1170 mm / 46.1 in |
| Seat Height | 875 mm / 34.4 in |
| Wheelbase | 1505 mm / 59.3 in |
| Ground Clearance | 210 mm / 8.3 in |
| Dry Weight | 173 kg / 381.4 lbs |
| Wet Weight | 186 kg / 410.1 lbs |
| WHEEL SPECS | |
| Front Tyre | 120/70-17 |
| Rear Tyre | 160/60-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 15 Litres / 3.9 US gal |
| Fuel Consumption | — |
| Top Speed | — |
Supermoto-styled road version of Yamaha's 660 cc single, with 17 inch wheels front and rear and a large front disc, giving a lower and sportier stance than the off-road based XT660R. It uses the same fuel-injected liquid-cooled engine and suits city and twisty-road riding rather than gravel.
