| MODEL | YAMAHA YZF-R125 2009 |
| Year | 2009 |
| Engine Type | Four-stroke, single cylinder, SOHC, 4 valve |
| Displacement / Capacity | 124.7 cc / 7.61 cu in |
| Bore X Stroke | 52 x 58.6 mm / 2.05 x 2.31 in |
| Compression Ratio | 11.2:1 |
| Cooling System | Liquid cooled |
| Max Power | 12.6 kW / 17 hp @ 8500 rpm |
| Max Torque | 15 Nm / 1.25 kg-m @ 7500 rpm |
| Ignition | TCI |
| Induction | Fuel injection |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 6 speed |
| Clutch | Wet multiple-disc |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Deltabox |
| Front Suspension | Telescopic forks, 130 mm / 5.1 in travel |
| Rear Suspension | Swinging arm, 125 mm / 4.9 in travel |
| Front Brakes | Single 292 mm disc |
| Rear Brakes | Single 230 mm disc |
| DIMENSION SPECS | |
| Overall Length | 2015 mm / 79.3 in |
| Overall Width | 660 mm / 26.0 in |
| Overall Height | 970 mm / 38.2 in |
| Seat Height | 810 mm / 31.8 in |
| Wheelbase | 1355 mm / 53.3 in |
| Ground Clearance | 155 mm / 6.1 in |
| Dry Weight | 127 kg / 279 lb |
| Wet Weight | 136 kg / 299.8 lb |
| WHEEL SPECS | |
| Front Tyre | 90/80-17 |
| Rear Tyre | 130/70-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 13.8 Litres / 3.6 US gal |
| Fuel Consumption | 2.8 L/100 km |
| Top Speed | approx. 140 km/h / 87 mph |
Second model year of the first-generation YZF-R125, with the same liquid-cooled fuel-injected single and Deltabox chassis as the 2008 bike. The page lists no mechanical changes from 2008.
