| MODEL | YAMAHA DX 250 1970 |
| Year | 1970 |
| Engine Type | Two stroke (source text: 2-cylinder, 5-port, twin carburetors) |
| Displacement / Capacity | 247 cc / 15.0 cu in |
| Bore X Stroke | 54 x 54 mm |
| Compression Ratio | 6.7:1 |
| Cooling System | Air cooled |
| Max Power | 22 kW / 30 hp @ 7200 rpm |
| Max Torque | 28.6 Nm / 2.92 kgf-m @ 7000 rpm |
| Ignition | Flywheel magneto |
| Induction | Carburetor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | Autolube oil injection |
| Gear Box | 6 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Double cradle, high-tensile steel |
| Front Suspension | Telescopic forks |
| Rear Suspension | Dual shocks |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 138 kg / 304.2 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.00-18 |
| Rear Tyre | 3.50-18 |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | — |
Released in April 1970 as the 250 cc sibling of the RX350 sport model, the DX 250 used a newly designed five-port two-stroke twin with Autolube oil injection. It sat in a double-cradle frame inspired by Yamaha's production racers and was marketed for light, agile handling with fully weather-proof drum brakes.
