autoevolution

Segment: Enduro/Offroad

The big news in the powerplant is the bump in displacement from 465 to 487cc, accomplished simply by increasing the cylinder bore two millimeters.

This follows the large, seven-millimeter increase in stroke which boosted the IT's displacement from 425 to 465cc in 1981. Aside from the trendiness involved in increasing their open-classers' engine sizes, most manufacturers are nudging 500cc because more displacement is the most straightforward route to better power.

YAMAHA IT 490 1983 - 1984 2 Photos
YAMAHA IT 490 (1983 - 1984)YAMAHA IT 490 (1983 - 1984)

YAMAHA IT 490 490

engine specs
Type
Two stroke, single cylinder, read valve, air cooled
Displacement
490 cm3
Bore X Stroke
3.4x3.2 in OR 86 mm
Compression Ratio
4.9:1
Horsepower
35/6000 KW(hp)/RPM
Torque
31/5500 lb-ft/RPM OR 42/5500 Nm/RPM
Fuel System
VM38SS Mikuni carburetor
transmission specs
Gearbox
5-Speed
Clutch
Wet multi-discs
Primary Drive
-
Final Drive
Chain
chassis specs
Frame
Steel
Front Suspension
43mm Telescopic adjustable forks
Rear Suspension
Mono shock, adjustable spring preload and rebound damping
Front Brake
Drum
Rear Brake
Drum
dimension specs
Overall Length
-
Overall Width
-
Seat Height
37.2 in OR 945 mm
Weelbase
56.5 in OR 1435 mm
Ground Clearance
13.1 in OR 333 mm
Weight
271 lbs OR 123 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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