The Yamaha SR250 motorcycle was produced from 1980 to 1982 and featured a four-stroke, single-cylinder, SOHC, two-valve engine with a capacity of 239cc. The engine was cooled by air and had a compression ratio of 8.9:1. The bike had a 34mm Mikuni carburettor and was ignited electronically. The electric starter produced a maximum power output of 21 horsepower (15.7 kW) at 7700 rpm and a maximum torque of 18.7 ft-lb (T25.5 Nm) at 7000 rpm.
The motorcycle had a five-speed transmission, and the final drive was a chain. The front suspension was 32mm telescopic forks, and the rear suspension had dual shock 5-way preload adjustment. Both front and rear brakes were drum brakes. The front and rear tyres were 3.00-18 and 120/90-16 respectively. The wheelbase was 1340mm (52.75 in), and the seat height was 740mm (29.0 in).
The Yamaha SR250 had a wet weight of 130 kg (287 lbs) and a fuel capacity of 10.8 litres (2.7 US gallons). The bike had an average fuel consumption of 70 miles per gallon and could reach a top speed of 89 mph (143.2 km/h). In standing 1/4 mile, the bike took 16.3 seconds to complete. Overall, the Yamaha SR250 was a dependable and efficient motorcycle that provided a comfortable riding experience.
Technical specifications:
Make Model: Yamaha SR 250
| Year | 1980 – 82 |
|---|---|
| Engine | Four stroke, single cylinder, SOHC, 2 valve |
| Capacity | 239 cc / 15.2 cu-in |
| Bore x Stroke | 73.5 x 56.5 mm |
| Cooling System | Air cooled |
| Compression Ratio | 8.9:1 |
| Induction | 34mm Mikuni carburettor |
| Ignition | Electronically |
| Starting | Electric |
| Max Power | 21 hp / 15.7 kW @ 7700 rpm |
| Max Torque | 18.7 ft-lb / T25.5 Nm @ 7000 rpm |
| Transmission | 5 Speed |
| Final Drive | Chain |
| Front Suspension | 32mm Telescopic forks |
| Rear Suspension | Dual shock 5-way preload adjustment. |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| Front Tyre | 3.00-18 |
| Rear Tyre | 120/90-16 |
| Wheelbase | 1340 mm / 52.75 in |
| Seat Height | 740 mm / 29.0 in |
| Wet Weight | 130 kg 287 lbs |
| Fuel Capacity | 10.8 Litres / 2.7 US gal |
| Consumption Average | 70 mpg |
| Standing 1/4 Mile | 16.3 sec |
| Top Speed | 89 mph / 143.2 km/h |
