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Yamaha RD 250

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Make Model

 Yamaha RD 250

Year

 1972

Engine

 Two stroke, torque induction, parallel twin

Capacity

 247 cc / 15.0 cu-in
Bore x Stroke 54 х 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

 Drum

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

Road Test

 1974 RD 250 Group Test
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Any corrections or more information on these motorcycles will be kindly appreciated.
 
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