Motorcycles Specs > Yamaha > Yamaha DT 125 MX

Yamaha DT 125 MX Specs

The Yamaha DT 125 MX model is a Enduro / offroad bike manufactured by Yamaha . In this version sold from year 1978 , the dry weight is 95.0 kg (209.4 pounds) and it is equipped with a Single cylinder, two-stroke motor. The engine produces a maximum peak output power of 14.00 HP (10.2 kW) @ 6500 RPM and a maximum torque of 1.53 Nm (0.2 kgf-m or 1.1 ft.lbs) @ 6500 RPM . With this drive-train, the Yamaha DT 125 MX is capable of reaching a maximum top speed of 110.0 km/h (68.4 mph) . On the topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, the Yamaha DT 125 MX has a  frame with front suspension being Hydraulic telescopic fork and at the rear, it is equipped with Monocross . Stock tire sizes are  on the front, and  on the rear. As for stopping power, the Yamaha DT 125 MX braking system includes Expanding brake (drum brake) size 130 mm (5.1 inches) at the front and Expanding brake (drum brake) size 130 mm (5.1 inches) at the back. 

Yamaha DT 125 MX General Information

Brand Yamaha 
Model Yamaha DT 125 MX 
Start year 1978 
Year 1978 
Category Enduro / offroad 
Factory Warranty (Years / miles)

Yamaha DT 125 MX Dimensions, Aerodynamics and weight

Frame type
Seat details
Length 2,085 mm (82.1 inches) 
Width 865 mm (34.1 inches) 
Height 1,120 mm (44.1 inches) 
Seat Height 845 mm (33.3 inches) If adjustable, lowest setting. 
Alternate Seat Height
Ground Clearance 265 mm (10.4 inches) 
Trail size
Wheels details
Front Tyres - Rims dimensions
Rear Tyres - Rims dimensions
Front brakes Expanding brake (drum brake) 
Rear brakes Expanding brake (drum brake) 
Front Brakes Dimensions - Disc Dimensions 130 mm (5.1 inches) 
Rear Brakes Dimensions - Disc Dimensions 130 mm (5.1 inches) 
Curb Weight (including fluids) 102.0 kg (224.9 pounds) 
Dry Weight 95.0 kg (209.4 pounds) 
Front Percentage of Weight
Rear Percentage of Weight
Weight-Power Output Ratio : 0.1474 HP/kg 
Fuel Tank Capacity 7.00 litres (1.85 gallons) 
Reserve Fuel Capacity 1.00 litres (0.26 gallons) 
Carrying Details and Capacity
Front Suspension Hydraulic telescopic fork 
Front Suspension Travel 180 mm (7.1 inches) 
Rear Suspension Monocross 
Rear Suspension Travel 145 mm (5.7 inches) 

Yamaha DT 125 MX Engine and Transmission Technical Data

Engine type - Number of cylinders Single cylinder, two-stroke 
Engine details
Fuel system Carburettor. Mikuni VM 24 SH 
Engine size - Displacement - Engine capacity 123.00 ccm (7.51 cubic inches) 
Bore x Stroke 56.0 x 50.0 mm (2.2 x 2.0 inches) 
Compression Ratio
Number of valves per cylinder
Camshaft Valvetrain Configuration Membrane 
Maximum power - Output - Horsepower 14.00 HP (10.2 kW) @ 6500 RPM 
Maximum torque 1.53 Nm (0.2 kgf-m or 1.1 ft.lbs) @ 6500 RPM 
Engine Maximum RPM 8000 
Cooling system Air 
Lubrication system Autolube 
Engine oil capacity 1.00 litres (1.06 quarts) 
Exhaust system
Gearbox 6-speed 
Transmission type, final drive ratio Chain 
Clutch type

Yamaha DT 125 MX Performance

Top Speed 110.0 km/h (68.4 mph) 
Acceleration 0 to 100 km/h (0 to 62 mph)
Acceleration 0 to 400m (1/4 mile)
Recuperation 60 to 140 km/h in highest gear
Fuel Consumption - MPG - Economy - Efficiency
CO2 emissions

Yamaha DT 125 MX Electrical Systems, Ignition and Equipment

Ignition Type
Electrical Details
Starter Type Kick 
How much horsepower does a Yamaha DT 125 MX have?
The Yamaha DT 125 MX has 14.00 HP (10.2 kW) @ 6500 RPM.

How fast is a Yamaha DT 125 MX?
The Yamaha DT 125 MX top speed is 110.0 km/h (68.4 mph).

How much does a Yamaha DT 125 MX weighs?
The Yamaha DT 125 MX weighs 95.0 kg (209.4 pounds).

How tall (seat height) is a Yamaha DT 125 MX?
The Yamaha DT 125 MX seat height is 845 mm (33.3 inches) If adjustable, lowest setting.

How many gears does a Yamaha DT 125 MX have?
The Yamaha DT 125 MX have 6 gears.