Yamaha DT 400back 1977

Air cooled, 397cc, Single, 2-stroke, Reed valve

Power: 20.8 HP (15.3 kW) @ 5600 rpm
Torque: 37.29 Nm (27.5 lb-ft) @ 5000 rpm
Final drive: Chain
Top speed: 84.51 mph
Curb weight: 310.9 lbs
Category: Offroad
Tags: Enduro
Engine and transmission
Engine type: 1 cylinders, 2-stroke, Single
Displacement: 397 cc (24.26 cubic inches)
Bore × stroke: 3.35 inch × 2.76 inch (oversquare - shortstroke)
Cooling system: Air cooled
Power: 20.8 HP (15.3 kW) @ 5600 rpm
Torque: 37.29 Nm (27.5 lb-ft) @ 5000 rpm
Throttle: Cable operated
Valves
Valve train: Reed valve, variable
Fuel and ignition
Sparks per cylinder: 1
Fuel supply system: Carburetor
Ignition type: mechanically timed
Compression: 6.4:1
Engine mounting: Vertical
Gear box: Manual 5-speed
Clutch: Wet, multiple discs, cable operated
Final drive: Chain
Starter: Kick-starter
Dimensions
Wheel base: 55.5 inch
Weight
Curb weight: 310.9 lbs
Dry weight: 271.2 lbs
Chassis and suspension
Frame type: steel, Double cradle frame
Front
Suspension: Cartridge
Brake: Drum
Rear
Suspension: twin shock, Swingarm
Brake: Drum
Other
ABS available: No
Power-to-weight ratio: 0.11 KW/lbs (9.22 lbs/HP)
Top speed: 84.51 mph
Fuel capacity: 2.38 gals
Number of riders: 2 persons

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