| MODEL | YAMAHA RD 250R 1984 - 1985 |
| Year | 1984 - 1985 |
| Engine Type | Two stroke, parallel twin |
| Displacement / Capacity | 247 cc / 15.0 cu in |
| Bore X Stroke | 54 x 54 mm |
| Compression Ratio | 6.2:1 |
| Cooling System | Liquid cooled |
| Max Power | 26.1 kW / 35.5 hp @ 8500 rpm |
| Max Torque | 30.2 Nm / 3.1 kgf-m @ 8000 rpm |
| Ignition | CDI |
| Induction | 2 x Mikuni VM28 SC carburettors |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | Autolube |
| Gear Box | 6 speed |
| Clutch | Wet multi-plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic forks |
| Rear Suspension | Monocross |
| Front Brakes | Single 267 mm disc |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 785 mm / 30.9 in |
| Wheelbase | — |
| Ground Clearance | 165 mm / 6.4 in |
| Dry Weight | 139 kg / 306.4 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.00-18 |
| Rear Tyre | 3.50-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 16.5 Litres / 4.3 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The liquid-cooled 247 cc two-stroke twin sold as the RD 250R in some markets and the RZ 250R in others, with a six-speed box, rear monocross suspension and a single front disc. It was a light, quick road-going descendant of Yamaha's racing-derived LC range, aimed at riders wanting a high-revving quarter-litre sports bike.
