The Yamaha RD 250 (reduced effect) motorcycle specifications include a 247 cc (15.07 cu in) engine, a 6-speed gearbox, and a listed weight of 158 kg (348.3 lb).
Key specifications
How the Yamaha RD 250 (reduced effect) compares
This compares the motorcycle with all Yamaha models in this specifications database. The blue marker is this model and the grey line is the Yamaha database average.
About 55% lower than the Yamaha database average. Around the 32nd percentile across Yamaha models.
About 15% lighter than the Yamaha database average. Around the 40th percentile across Yamaha models.
About 30% larger than the Yamaha database average. Around the 73rd percentile across Yamaha models.
Yamaha database percentile rankings
Percentiles show where this motorcycle sits across the Yamaha specifications database. They are descriptive database rankings, not performance ratings.
247 cc — larger displacement than about 32% of Yamaha models.
158 kg — heavier than about 40% of Yamaha models, or lighter than about 60%.
17 L — larger than about 73% of Yamaha fuel tanks in this database.
Mechanical overview
Additional useful specifications
| Front tire size | 3.00-18 |
|---|---|
| Rear tire size | 3.50-18 |
| Bore/stroke ratio | 1.00:1 (Square) |
Model information
| Year released | 1981 |
|---|
Engine specifications
| Engine type | Twin, two-stroke |
|---|---|
| Displacement | 247 cc (15.07 cu in) |
| Bore × stroke | 54.0 x 54 mm (2.1 x 2.1 inches) |
| Compression ratio | 6.2:1 |
| Cooling system | Liquid |
| Fuel control | Membrane |
Transmission and drivetrain
| Gearbox | 6-speed |
|---|---|
| Final drive | Chain (final drive) |
Brakes, wheels and tires
| Front brakes | Single disc |
|---|---|
| Rear brakes | Expanding brake |
| Front tire | 3.00-18 |
| Rear tire | 3.50-18 |
Dimensions and weight
| Wet weight | 158 kg (348.3 lb) |
|---|
Fuel and emissions
| Fuel capacity | 17.00 L (4.49 US gal) |
|---|
Performance
| Top speed | 149.0 km/h (92.6 mph) |
|---|
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Yamaha models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Yamaha information before relying on them. Visit the official Yamaha website.