Yamaha DT50: history, specs, pictures

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Yamaha DT50
Also called DT50 Supermotard, DT 50 Supermotard, DT50 Enduro, DT 50 Enduro, DT 50 X, DT 50 R, DT50R, DT50X, DT50MX, DT 50 MX, DT 50
Production 1981 - 2012
Class Trail
single cylinder, four-stroke
Bore / Stroke 74.0mm x 58.0mm
Top Speed 56 mph (90 km/h)
Horsepower 17.57 HP (13.1 KW) @ 7500RPM
Torque 14.01 ft/lbs (19.0 Nm) @ 6500RPM
Fuel System injection
Ignition tci
Spark Plug NGK B8ES '88-90
Battery YUASA 6N4-2A-5 '88-90
Transmission Gear box: 5-speed

Final Drive: chain

Clutch: wet multi-plate coil spring
Final Drive Chain: 420 `88-90[1]
Suspension Front: 35mm telescopic fork
Rear: bottom-link
Brakes Front: single disc
Rear: single disc
Front Tire 2.50-19 '88-90
110/70-17 - ?
Rear Tire 3.00-17 '88-90
130/70-17 -?
Wheelbase 53.74 inches (1365 mm)
Length 80.31 inches (2040 mm)
Width 31.69 inches (805 mm)
Height 43.7 inches (1110 mm)
Seat Height 31.1 inches (790 mm)
Weight 293.21 pounds (133.0 Kg) (dry), 104.0 kg (wet)
Oil Capacity 0.37 Gallon (1.40 Liters)
Recommended Oil Yamalube 10w-40
Fuel Capacity 2.54 Gallon (9.60 Liters)
Fuel Consumption 2.56 liters/100 km (39.1 km/l or 91.88 mpg)
Related Yamaha DT100
Yamaha DT125
Manuals Service Manual

The Yamaha DT50X was a single cylinder, four-stroke Trail motorcycle produced by Yamaha between 1981 and 2012. It could reach a top speed of 56 mph (90 km/h). Max torque was 14.01 ft/lbs (19.0 Nm) @ 6500 RPM. Claimed horsepower was 17.57 HP (13.1 KW) @ 7500 RPM.


The engine was a oil & air cooled single cylinder, four-stroke. A 74.0mm bore x 58.0mm stroke result in a displacement of just 249.0 cubic centimeters. Fuel was supplied via a single overhead cams (sohc).


The bike has a 5-speed transmission. Power was moderated via the wet multi-plate coil spring.


It came with a 110/70-17 front tire and a 130/70-17 rear tire. Stopping was achieved via single disc in the front and a single disc in the rear. The front suspension was a 35mm telescopic fork while the rear was equipped with a bottom-link. The DT50X was fitted with a 2.54 Gallon (9.60 Liters) fuel tank. The bike weighed just 293.21 pounds (133.0 Kg). The wheelbase was 53.74 inches (1365 mm) long.


1990 Yamaha DT50 in Turquoise/Gray
1990 Yamaha DT50 in Turquoise/Gray
1990 Yamaha DT50 in Turquoise/Gray

In Media[edit]


  1. 2019 Western Power Sports Catalog. Western Power Sports. 2019.