Yamaha RD250 (1973)

The Yamaha RD250 motorcycle was produced in 1973 and is a two-stroke, parallel twin engine with a capacity of 247 cc. It has a compression ratio of 6.7:1 and is air-cooled. The autolube lubrication system is used, and it has a 2x Mikuni VM28 SC carburetor induction. The ignition system consists of a battery and coil with breaker points, and it can be started with a kick. The maximum power output is 30 hp at 7500 rpm, and the maximum torque is 21 lb-ft at 7000 rpm. The motorcycle includes a wet multi-plate clutch and a six-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 also has a telescopic fork front suspension and dual shock rear suspension, and the front brake is a single disc while the rear brake is a drum. The motorcycle is equipped with 3.00S-18-4PR front tires and 3.50S-18-4PR rear tires. The dimensions of the motorcycle are 2030 mm in length, 830 mm in width, and 1085 mm in height with a wheelbase of 1325 mm and ground clearance of 150 mm. The motorcycle has a dry weight of 152 kg and has a fuel capacity of 16.5 liters.

Technical specifications:

Make Model: Yamaha RD 250

Year: 1973
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