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.
2 Photos
YAMAHA IT 490 1983 - 1984
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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
- -