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Yamaha Specifications

Yamaha DT125 (1980)

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Yamaha DT125 (1980)

At a glance

Capacity
123 cc / 7.5 cu-in
Power
14 hp / 10.3 kW @ 6500 rpm
Torque
1.5 kgf-m / 15.2 Nm @ 6500 rpm
Seat height
855 mm / 33.6 in

The full picture.

The Yamaha DT 125MX is a two-stroke, single-cylinder, reed-valve motorcycle that was produced in 1980. It has a capacity of 123 cc and a compression ratio of 7.2:1. The bike uses a single 24 mm Mikuni induction and is powered by a flywheel magneto ignition system. The engine produces a maximum power of 14 hp at 6500 rpm and a maximum torque of 1.5 kgf-m at 6500 rpm. The six-speed transmission and chain final drive are designed for smooth shifting and efficient power delivery. The bike features telescopic forks front suspension and a monocross rear suspension that offer a comfortable ride. The front and rear brakes are drum type, and the front and rear wheels have a tire sizes of 2.75-21 and 3.50-18, respectively. The bike measures 2080 mm in length, 885 mm in width, and 1120 mm in height. The wheelbase is 1325 mm, the seat height is 855 mm, and the ground clearance is 265 mm. The dry weight of the bike is 96 kg, and the fuel capacity is 7 liters. The average fuel consumption is 79 mpg, and the bike has a top speed of 74 mph with a standing quarter-mile time of 19.9 seconds. Overall, the Yamaha DT 125MX is an excellent bike with great performance and a comfortable ride.


Technical specifications:

Make Model: Yamaha DT 125MX

Motorcycle technical specifications
Year1980
EngineTwo stroke, single cylinder, reed-valve
Capacity123 cc / 7.5 cu-in
Bore x Stroke56 50 mm
Cooling SystemAir cooled
Compression Ratio7.2:1
LubricationAutolube
Oil Capacity0.9 Litres
InductionSingle 24 mm Mikuni
IgnitionFlywheel Magneto
StartingKick
Max Power14 hp / 10.3 kW @ 6500 rpm
Max Torque1.5 kgf-m / 15.2 Nm @ 6500 rpm
ClutchWet multiplate
Transmission6 speed
Final DriveChain
Front SuspensionTelescopic Forks
Front Wheel Travel160 mm / 6.2 in
Rear SuspensionMonocross
Rear Wheel Travel115 mm / 4.5 in
Front BrakesDrum
Rear BrakesDrum
Front Tyre2.75-21
Rear Tyre3.50-18
DimensionsLength 2080 mm / 81.8 in Width 885 mm / 34.8 in Height 1120 mm / 41.0 in
Wheelbase1325 mm / 52.2 in
Seat Height855 mm / 33.6 in
Ground Clearance265 mm / 10.4 in
Dry Weight96 kg / 212 lbs
Fuel Capacity7 Litres / 1.58 gal
Consumption Average79 mpg
Standing 1/4 Mile19.9 sec
Top Speed74 mph