| MODEL | YAMAHA SR 125 1991 - 2003 |
| Year | 1991 - 2003 |
| Engine Type | Four-stroke, single cylinder, OHV, 2 valves |
| Displacement / Capacity | 125 cc / 7.6 cu in |
| Bore X Stroke | 57 x 48.8 mm |
| Compression Ratio | 10.0:1 |
| Cooling System | Air cooled |
| Max Power | 8.8 kW / 12 hp @ 8500 rpm |
| Max Torque | 9.8 Nm @ 8000 rpm |
| Ignition | CDI |
| Induction | Teikei Y24P/1 carburettor |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5-speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic forks, 120 mm / 4.5 in travel |
| Rear Suspension | Dual shocks, 78 mm / 3.0 in travel |
| Front Brakes | Single 237 mm disc |
| Rear Brakes | 130 mm drum |
| DIMENSION SPECS | |
| Overall Length | 2020 mm / 79.5 in |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 745 mm / 29.3 in |
| Wheelbase | 1285 mm / 50.5 in |
| Ground Clearance | — |
| Dry Weight | 103 kg / 227 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.00-17 |
| Rear Tyre | 3.00-16 |
| FUEL SYSTEM | |
| Fuel Capacity | 10 Litres / 2.6 US gal |
| Fuel Consumption | — |
| Top Speed | — |
A light, learner-friendly 125 cc retro single with electric start, a five-speed box and low seat; the SR stands for Single Road. Technically a smaller sibling of the SR250. It was UK-sold from 1982, withdrawn in 1986 and reintroduced in 1991.
