1978 Yamaha DT 125 MX

Yamaha DT 125 MX 1978


1978 Yamaha DT 125 MX specifications, pictures, reviews and rating

General information
Model name Yamaha DT 125 MX
Model year 1978
Category Enduro / offroad
Rating 3.5  Check out the detailed rating of off-road capabilities, engine performance, maintenance cost, etc. Compare with any other bike.
Engine and transmission
Displacement 123.0 ccm (7.51 cubic inches)
Engine type Single cylinder, two-stroke
Power output 14.0 HP (10.2 kW)) @ 7000 RPM
Torque 9.8 Nm (1.0 kgf-m or 7.2 ft.lbs) @ 6500 RPM
Top speed 110.0 km/h (68.4 mph)
Max RPM 8000
Bore x stroke 56.0 x 50.0 mm (2.2 x 2.0 inches)
Fuel system Carburettor. Mikuni VM 24 SH
Fuel control Membrane
Lubrication system Autolube
Cooling system Air
Gearbox 6-speed
Transmission type Chain (final drive)
Chassis, suspension, brakes and wheels
Rake (fork angle) 30.0°
Front suspension Hydraulic telescopic fork
Front wheel travel 180 mm (7.1 inches)
Rear suspension Monocross
Rear wheel travel 145 mm (5.7 inches)
Front tire 2.75-21
Rear tire 3.00-18
Front brakes Expanding brake (drum brake)
Diameter 130 mm (5.1 inches)
Rear brakes Expanding brake (drum brake)
Diameter 130 mm (5.1 inches)
Physical measures and capacities
Dry weight 95.0 kg (209.4 pounds)
Weight incl. oil, gas, etc 102.0 kg (224.9 pounds)
Power/weight ratio 0.1474 HP/kg
Seat height 845 mm (33.3 inches) If adjustable, lowest setting.
Overall height 1120 mm (44.1 inches)
Overall length 2085 mm (82.1 inches)
Overall width 865 mm (34.1 inches)
Ground clearance 265 mm (10.4 inches)
Fuel capacity 7.00 litres (1.85 US gallons)
Reserve fuel capacity 1.00 litres (0.26 US gallons)
Oil capacity 1.00 litres (1.06 US quarts)
Other specifications
Starter Kick
Update specsReport missing specs or required updates.
Further information
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MaintenanceFind parts, fluids. filters, maintenance tools and service manuals at Amazon.com.
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Offroad capabilities for the 1978 Yamaha DT 125 MX:

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