Yamaha DT 250 MX 1978

Air cooled, 246cc, Single, 2-stroke, Reed valve

Engine and transmission Switch unit
Engine type:	1 cylinders, 2-stroke, Single
Displacement:	246 cc (15.03 cubic inches)
Bore × stroke:	2.76 inch × 2.52 inch (oversquare - shortstroke)
Cooling system:	Air cooled
Power:	15.91 HP (11.7 kW) @ 5400 rpm
Throttle:	Cable operated
Valves
Valve train:	Reed valve, variable
Fuel and ignition
Sparks per cylinder:	1
Fuel supply system:	Carburetor
Compression:	6.7:1
Engine mounting:	Transverse
Gear box:	Manual 5-speed
Clutch:	Wet, multiple discs, cable operated
Final drive:	Chain

Dimensions
Weight
Curb weight:	297.6 lbs
Chassis and suspension
Frame type:	steel, Double cradle frame
Front
Suspension:	Cartridge
Brake:	Drum
Rear
Suspension:	mono shock, Swingarm
Brake:	Drum
Other
ABS available:	No
Power-to-weight ratio:	0.09 KW/lbs (11.54 lbs/HP)
Top speed:	67.73 mph
Fuel capacity:	2.38 gals
Number of riders:	2 persons

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