| MODEL | YAMAHA XS 250 1977 - 1981 |
| Year | 1977 - 1981 |
| Engine Type | Four stroke, 180 degree parallel twin, SOHC, 2 valves per cylinder |
| Displacement / Capacity | 248 cc / 15.2 cu in |
| Bore X Stroke | 55 x 52.4 mm |
| Compression Ratio | 9.6:1 |
| Cooling System | Air cooled |
| Max Power | 20.1 kW / 27 hp @ 9500 rpm |
| Max Torque | 2.2 kgf-m / 15.9 lb-ft @ 8500 rpm |
| Ignition | Coil and contact breaker |
| Induction | 2x 32 mm Mikuni carburettors |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 6 speed |
| Clutch | Wet multiplate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Duplex cradle |
| Front Suspension | Telescopic forks |
| Rear Suspension | Dual shocks, swing arm, 5-position preload adjustable |
| Front Brakes | Single 267 mm disc |
| Rear Brakes | 178 mm drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 810 mm / 31.8 in |
| Wheelbase | 1359 mm / 53.5 in |
| Ground Clearance | — |
| Dry Weight | 165.5 kg / 365 lbs |
| Wet Weight | 174 kg / 392.4 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.00-18 |
| Rear Tyre | 3.50-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 14 Litres / 3.7 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The XS 250 was Yamaha's small four-stroke parallel twin with a single overhead cam, a 180 degree crank and a six-speed gearbox. It gave learner-friendly power with a disc front brake and drum rear. It was a straightforward, light roadster.
