autoevolution

Segment: Enduro/Offroad

For 1980, Yamaha comes with a new 425cc, two stroke power plant out muscles many bigger engines.

Yamaha`s reed valve Torque Induction churns out gobs of low end
torque and ensures steady, reliable power at any spped.

YAMAHA IT 425 1980 - 1981 2 Photos
YAMAHA IT 425 (1980 - 1981)YAMAHA IT 425 (1980 - 1981)

YAMAHA IT 425 425

engine specs
Type
Two stroke, single cylinder, read valve, air cooled
Displacement
425 cm3
Bore X Stroke
3.3x3.0 in OR 84 mm
Compression Ratio
7.3:1
Horsepower
36.9/6000 KW(hp)/RPM
Torque
31/5500 lb-ft/RPM OR 42/5500 Nm/RPM
Fuel System
38mm VM38SS Mikuni carburetor
transmission specs
Gearbox
5-Speed
Clutch
Wet multi-discs
Primary Drive
-
Final Drive
Chain
chassis specs
Frame
-
Front Suspension
43mm Telescopic adjustable forks, 300mm wheel trave
Rear Suspension
Mono shock, adjustable spring preload and rebound damping, 300mm wheel travel
Front Brake
Drum
Rear Brake
Drum
dimension specs
Overall Length
-
Overall Width
-
Seat Height
-
Weelbase
56.3 in OR 1430 mm
Ground Clearance
11.2 in OR 284 mm
Weight
269 lbs OR 122 kg
Fuel Capacity
3.6 gallons OR 13.6 L
tyres specs
Front
3.00 -21
Rear
150/80 -18
power system specs
Power pack
-
Nominal Capacity
-
Maximum Capacity
-
Charger type
-
Charging time (normal)
-
Charging time (quick)
-
Range
-
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