Yamaha DT250: history, specs, pictures

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Yamaha DT250
Also called DT 250F, DT250F, DT 250 MX, DT 250, DT250MX
Production 1971 - 1982
Class Dual purpose
single cylinder, two-stroke
Bore / Stroke 70.0mm x 64.0mm
Top Speed 68 mph (109 km/h)
Horsepower 15.69 HP (11.7 KW) @ 5400RPM
Torque 12.91 ft/lbs (17.5 Nm) @ 6500RPM
Fuel System carburetor
Ignition contact breaker point
Spark Plug NGK B8ES '74-79 [1]
Battery YUASA 6N4B-2A-3 '74-75
YUASA 6N6-3B-1 76-79 [1]
Transmission Gear box: 5-speed

Final Drive: chain

Clutch: wet plate
Final Drive Chain: 520x
Brakes Front: expanding brake
Rear: expanding brake
Front Tire 3.00-21 [1]
Rear Tire 4.00-18 [1]
Weight 244.93 pounds (111.1 Kg) (dry), 135.0 kg (wet)
Recommended Oil Yamalube 10w-40
Fuel Capacity 2.38 Gallon (9.00 Liters)
Fuel Consumption 2.50 liters/100 km (40.0 km/l or 94.09 mpg)
Related Yamaha DT125
Competition Harley-Davidson SX250
Kawasaki KE250B
Yamaha DT250
Honda XL250
Value $1,000 - $5,000
Manuals Service Manual

The Yamaha DT250MX was a single cylinder, two-stroke Trail motorcycle produced by Yamaha between 1972 and 1982. It could reach a top speed of 68 mph (109 km/h). Max torque was 12.91 ft/lbs (17.5 Nm) @ 6500 RPM. Claimed horsepower was 15.69 HP (11.7 KW) @ 5400 RPM.


The engine was a air cooled single cylinder, two-stroke. A 70.0mm bore x 64.0mm stroke result in a displacement of just 246.0 cubic centimeters. Fuel was supplied via a membrane.


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


It came with a 3.00-21 front tire and a 4.00-18 rear tire. Stopping was achieved via expanding brake in the front and a expanding brake in the rear. The DT250MX was fitted with a 2.38 Gallon (9.00 Liters) fuel tank. The bike weighed just 244.93 pounds (111.1 Kg).



1973 DT250[edit]

VIN: 450-002XXX

1975 DT250B[edit]

1976 DT250C[edit]


In Media[edit]


  1. 1.0 1.1 1.2 1.3 2019 Western Power Sports Catalog. Western Power Sports. 2019.