Yamaha DT 250 MX Specs (Top Speed | Horsepower | Weight)

The Yamaha DT 250 MX motorcycle specifications include a 246 cc (15.01 cu in) engine, a 5-speed gearbox, and a listed weight of 135 kg (297.6 lb).

Key specifications

1978-1982Model years
246 ccDisplacement
135 kgWet weight
9 LFuel tank
Model years covered
19781979198019811982

Year-specific specification changes

No material specification changes from the 1978 baseline were found in the available data.

How the Yamaha DT 250 MX compares

This compares the motorcycle with all Yamaha models in this specifications database. The blue marker is this model and the grey line is the Yamaha database average.

Displacement246 cc
Low 49 ccAverage 550 ccHigh 1,852 cc

About 55% lower than the Yamaha database average. Around the 32nd percentile across Yamaha models.

Wet weight135 kg
Low 72.1 kgAverage 186.3 kgHigh 348.7 kg

About 28% lighter than the Yamaha database average. Around the 30th percentile across Yamaha models.

Fuel capacity9 L
Low 4 LAverage 13 LHigh 24 L

About 31% smaller than the Yamaha database average. Around the 30th percentile across Yamaha models.

This model Yamaha database average

Yamaha database percentile rankings

Percentiles show where this motorcycle sits across the Yamaha specifications database. They are descriptive database rankings, not performance ratings.

Displacement32nd

246 cc — larger displacement than about 32% of Yamaha models.

Wet weight30th

135 kg — heavier than about 30% of Yamaha models, or lighter than about 70%.

Fuel capacity30th

9 L — larger than about 30% of Yamaha fuel tanks in this database.

Mechanical overview

Engine layout snapshot

Single cylinder, two-stroke • 246 cc • Air cooled
Chassis snapshot

5-speed • Chain (final drive) • 3.00-21 front / 4.00-18 rear

Additional useful specifications

Front tire size 3.00-21
Rear tire size 4.00-18
Bore/stroke ratio 1.09:1 (Oversquare)

Model information

Category Enduro / offroad

Engine specifications

Engine type Single cylinder, two-stroke
Displacement 246 cc (15.01 cu in)
Bore × stroke 70.0 x 64 mm (2.8 x 2.5 inches)
Compression ratio 6.7:1
Cooling system Air
Fuel control Membrane

Transmission and drivetrain

Gearbox 5-speed
Final drive Chain (final drive)

Brakes, wheels and tires

Front brakes Expanding brake
Rear brakes Expanding brake
Front tire 3.00-21
Rear tire 4.00-18

Dimensions and weight

Wet weight 135 kg (297.6 lb)

Fuel and emissions

Fuel capacity 9.00 L (2.38 US gal)

Performance

Top speed 109.0 km/h (67.7 mph)

Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Yamaha models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Yamaha information before relying on them. Visit the official Yamaha website.