| MODEL | YAMAHA MT-03 660 2008 |
| Year | 2008 |
| Engine Type | Four stroke, single cylinder, 4 valve |
| Displacement / Capacity | 659 cc / 40.2 cu in |
| Bore X Stroke | 100 x 84 mm |
| Compression Ratio | 10.0:1 |
| 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 with separate aluminium die-cast oil tank |
| Gear Box | 5 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel tube truss diamond |
| Front Suspension | Telescopic forks, 130 mm / 5.1 in travel |
| Rear Suspension | Swinging arm, 122 mm / 4.75 in travel |
| Front Brakes | 2x 295 mm discs |
| Rear Brakes | Single 245 mm disc |
| DIMENSION SPECS | |
| Overall Length | 2070 mm / 81.5 in |
| Overall Width | 860 mm / 33.9 in |
| Overall Height | 1115 mm / 43.9 in |
| Seat Height | 805 mm / 31.7 in |
| Wheelbase | 1420 mm / 55.9 in |
| Ground Clearance | 200 mm / 7.9 in |
| Dry Weight | 174.5 kg / 384.7 lbs |
| Wet Weight | — |
| 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 | 163.3 km/h / 101.5 mph |
The MT-03 was Yamaha's single-cylinder entry in the MT roadster family, built on the engine of the XT660 trail bike but retuned for street use. It paired a torquey 660 cc liquid-cooled single with an upright, supermoto-like riding position and a steel truss frame. Twin 295 mm front discs and an underseat muffler gave it a distinctive, compact look.
