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, two-stroke
Bore / Stroke 40.0mm x 39.7mm
Compression ratio 5.3
Fuel System Yeikei Y12P arburetor
Ignition Flywheel magneto
Spark Plug NGK B6HS
Battery 6N4B-2A-3/6V
Transmission Gear box: 5-speed

Final Drive: chain

Clutch: wet multi-plate coil spring
Final Drive Chain: 420
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 50.4 inches (1280 mm)
Length 81.7 inches (2075 mm)
Width 32.9 inches (835 mm)
Height 44.7 inches (1135 mm)
Seat Height 32.3 inches (820 mm)
Weight 182 pounds (82 kg) (wet)
Oil Capacity 0.65 Liters
Recommended Oil 10W-30
Fuel Capacity 2.25 Gallon (8.5 L)
Related Yamaha DT100
Yamaha DT125
Manuals Service Manual

The Yamaha DT50X or (DT50 LC as it was known in other countries) was a single cylinder, two-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 7.57 HP (5.6 KW) @ 7500 RPM.

Engine[edit | edit source]

The engine was a liquid cooled single cylinder, two-stroke. A 40.0mm bore x 39.7mm stroke result in a displacement of just 49.0 cubic centimeters. Fuel was supplied by means of either a Mikuni vm18 smoothbore flatslide or a TK carburetor and the exhaust was an expansion chamber type with interchangeable addons

Drive[edit | edit source]

The bike has a 6-speed transmission. Power was moderated via the wet multi-plate coil spring.

Chassis[edit | edit source]

It came with a 2.50-19 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[edit | edit source]

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

In Media[edit | edit source]

References[edit | edit source]