The Yamaha RD 250 is a classic motorcycle from 1974 with a parallel twin two-stroke engine and a capacity of 247cc. It has a compression ratio of 6.7:1, is air-cooled and has autolube lubrication. It uses 2 Mikuni VM28 SC carburetors and starts through a kickstart. It delivers 30hp at 7500rpm and 21 lb-ft of torque at 7000rpm. It has a wet multi-plate clutch and a 6-speed transmission with a final drive chain. The gear ratios are 1st 19.67, 2nd 13.6, 3rd 10.08, 4th 7.59, 5th 6.79, and 6th 6.01. It features telescopic forks for front suspension and dual shocks for rear suspension. The bike has a single disc for front brakes and a drum for rear brakes. It comes with a 3.00S-18-4PR front tire and a 3.50S-18-4PR rear tire. The Yamaha RD 250 is 2030mm in length, 830mm in width, and 1085mm in height with a wheelbase of 1325mm and a ground clearance of 150mm. It is 152kg in dry weight and has a fuel capacity of 16.5 liters/4.2 US gallons.
Technical specifications:
Make Model: Yamaha RD 250
| Year | 1974 |
|---|---|
| Engine | Two stroke, torque induction, parallel twin |
| Capacity | 247 cc / 15.0 cu-in |
| Bore x Stroke | 54 54 mm |
| Cooling System | Air cooled |
| Compression Ratio | 6.7:1 |
| Lubrication | Autolube |
| Induction | 2x Mikuni VM28 SC carburetor |
| Ignition | Battery and coil with breaker points |
| Starting | Kick |
| Max Power | 30 hp / 22.3 kW @ 7500 rpm |
| Max Torque | 21 lb-ft / 2.9 kgf-m @ 7000 rpm |
| Clutch | Wet multi-plate |
| Transmission | 6 Speed |
| Final Drive | Chain |
| Gear Ratio | 1st 19.67 / 2nd 13.6 / 3rd 10.08 4th 7.59 / 5th 6.79 / 6th 6.01 |
| Front Suspension | Telescopic forks |
| Rear Suspension | Dual shocks |
| Front Brakes | Single disc |
| Rear Brakes | Drum |
| Front Tyre | 3.00S-18-4PR |
| Rear Tyre | 3.50S-18-4PR |
| Dimensions | Length 2030 mm / 79.9 in Width 830 mm / 32.6 in Height 1085 mm / 42.7 in |
| Wheelbase | 1325 mm / 52.1 in |
| Ground Clearance | 150 mm / 5.9 in |
| Dry Weight | 152 kg / 335 lbs |
| Fuel Capacity | 16.5 Liters / 4.2 US gal |
