| TECHNICAL SPECIFICATION |
|---|
| Model ID |
|---|
| Manufacturer (Make) | Yamaha |
| Model Name | RD 250 (reduced effect) |
| Year | 1981 |
| Category(class) | Sport |
| Engine |
|---|
| Engine Capacity (Displacement) | 247 ccm (15.07 cubic inches) |
| Engine Type | Twin |
| Bore x Stroke | Ø54.0 mm x 54.0 mm (Ø2.13 inches x 2.13 inches) |
| Bore/Stroke Ratio | 1 |
| Stroke | 2 |
| Timing System | MEMBRANE |
| Cooling System | Liquid |
| Powertrain |
|---|
| Gearbox | 6 speed |
| Chassis/Suspension/Brakes |
|---|
| Front Brakes | Single disc |
| Rear Brakes | Drum |
| Front Tire | 3.00-18 |
| Rear Tire | 3.50-18 |
| Dimensions |
|---|
| Curb Weight | 158 kg (348 lb) |
| Fuel Capacity | 17 litres (4.49 gallons) |
| Performance |
|---|
| Max Power | 27.00 HP (19.7 kW) at 8100 RPM |
| Power/Weight Ratio | 0.17 Hp/Kg |
| Top Speed | 149 km/h (93mph) |
| Acceleration (dart, speedup) time | |
| 0-100 km/h | 8.4 seconds |
| 0-60 mph | 8 seconds |
| 1/4 mile | - |
| 60 to 140 km/h, highest gear | - |
