| MODEL | YAMAHA WR 125R 2011 - 2012 |
| Year | 2011 - 2012 |
| Engine Type | Four-stroke, forward-inclined single cylinder, DOHC, 4 valve |
| Displacement / Capacity | 124.7 cc |
| Bore X Stroke | 52 x 58.6 mm |
| Compression Ratio | 11.2:1 |
| Cooling System | Liquid cooled |
| Max Power | 10.9 kW / 15 hp @ 9000 rpm |
| Max Torque | 12.2 Nm / 1.24 kgf-m @ 6000 rpm |
| Ignition | TCI |
| Induction | Fuel injection |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | — |
| Clutch | Wet, multiple coil spring |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel double cradle |
| Front Suspension | Telescopic fork, 210 mm / 8.2 in travel |
| Rear Suspension | Swinging arm link suspension, 230 mm / 9.0 in travel |
| Front Brakes | Single 248 mm disc |
| Rear Brakes | Single 220 mm disc |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 930 mm / 36.6 in |
| Wheelbase | 1430 mm / 56.3 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 133 kg / 293 lbs |
| WHEEL SPECS | |
| Front Tyre | 80/90-21 |
| Rear Tyre | 110/80-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 8.5 Litres / 2.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
Continuation of the first-generation WR125R enduro with no listed mechanical changes from the 2009-10 version. It is a light, tall trail bike built around a fuel-injected 125 four-stroke.
