1979 Yamaha RD 250 technical specifications

Technical specifications

Model: RD 250
Years: 1979
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: Single 267mm disc
Rear Brakes: Single 267mm disc
Front Tyre: 3.00S-18-4PR
Rear Tyre: 3.50S-18-4PR
Dimensions: Length 1995 mm / 78.5 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

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