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{{Motorcycle
|name            = Yamaha IT490
|photo= yamaha-it490-1984-1984-1.jpg
|aka              = IT 490
|manufacturer    = Yamaha
|parent_company  =
|production      = 1983 - 1984
|model_year      =
|predecessor      = [[Yamaha IT465]]
|successor        =
|class            = Enduro
|engine          = Two stroke, single cylinder, read valve, air cooled
|bore_stroke      = 86.4mm x 86.4mm
|compression      = 4.9:1
|top_speed        =80 mph
|power            = 35.0 HP (26.1 KW) @ 6000RPM
|torque          = 30.98 ft/lbs (42.0 Nm) @ 5500RPM
|ignition        = cdi
|spark_plug      = {{sparkplug|NGK B8ES}} '83-84
|battery          =
|transmission    = Gear box: 5-Speed <br>
Final Drive: Chain <br>
Clutch: Wet multi-discs <br>
|frame            =
|suspension      =Front: 43mm Telescopic adjustable forks <br>
Rear: Mono shock, adjustable spring preload and rebound damping
|brakes          =Front: Drum <br>Rear: Drum
|front_tire      = {{tire|3.00 -21}}
|rear_tire    = {{tire|150/80 -18}}
|rake_trail      =
|wheelbase        = 56.5 inches (1435 mm)
|length          =
|width            =
|height          =
|seat_height      = 37.2 inches (945 mm)
|dry_weight      = 275.58 pounds (125.0 Kg)
|wet_weight      = 123.0 kg
|fuel_capacity    = 3.59 Gallon (13.60 Liters)
|oil_capacity    =
|recommended_oil= Yamalube 10w-40
|fuel_consumption =
|turning_radius  =
|related          = [[Yamaha IT125]], [[Yamaha IT175]], [[Yamaha IT200]], [[Yamaha IT250]], [[Yamaha IT350]], [[Yamaha IT490]], [[Yamaha IT500]], [[Yamaha YZ490]]
|competition      = [[Honda CR500]], [[Kawasaki KX500]]
|final_drive= {{chain|520x110}} ‘83-84<ref name="wps_street_2019">{{cite book|title=2019 Western Power Sports Catalog|publisher=[https://www.wps-inc.com/catalogs Western Power Sports]|date=2019}}</ref>
|front_sprocket= 14T ‘83-84<ref name="wps_street_2019">{{cite book|title=2019 Western Power Sports Catalog|publisher=[https://www.wps-inc.com/catalogs Western Power Sports]|date=2019}}</ref>
|rear_sprocket= 44T ‘83-84<ref name="wps_street_2019">{{cite book|title=2019 Western Power Sports Catalog|publisher=[https://www.wps-inc.com/catalogs Western Power Sports]|date=2019}}</ref>
}}
The '''[[Yamaha]] IT 490''' was a Two stroke, single cylinder, read valve, [[air cooled]] Enduro [[motorcycle]] produced by [[Yamaha]] between 1983 and 1984. Max [[torque]] was 30.98 ft/lbs (42.0 Nm) @ 5500 RPM. Claimed [[horsepower]] was 35.0 HP (26.1 KW) @ 6000 RPM. 
==Engine==
The engine was a air cooled Two stroke, single cylinder, read valve, air cooled. A 86.4mm [[bore]] x 86.4mm [[stroke]] result in a [[displacement]] of just 490.0 cubic centimeters. 
==Drive==
The bike has a 5-Speed transmission. Power was moderated via the Wet multi-discs. 
==Chassis==
It came with a 3.00 -21 front [[tire]] and a 150/80 -18 rear tire. Stopping was achieved via Drum in the front and a Drum in the rear. The front suspension was a  43mm Telescopic adjustable forks while the rear was equipped with a Mono shock, adjustable spring preload and rebound damping. The IT 490 was fitted with a 3.59 Gallon (13.60 Liters) fuel tank. The bike weighed just 275.58 pounds (125.0 Kg). The wheelbase was 56.5 inches (1435 mm) long. 
==1983==
==1983==
<gallery mode='packed-hover'>
[[Image:1983-Yamaha-IT490-Blue-0.jpg|left|thumb|1983 Yamaha IT490 in Blue]][[Image:1983-Yamaha-IT490-Blue-1.jpg|left|thumb|1983 Yamaha IT490 in Blue]][[Image:1983-Yamaha-IT490-Blue-2.jpg|left|thumb|1983 Yamaha IT490 in Blue]][[Image:1983-Yamaha-IT490-Blue-3.jpg|left|thumb|1983 Yamaha IT490 in Blue]][[Image:1983-Yamaha-IT490-Blue-4.jpg|left|thumb|1983 Yamaha IT490 in Blue]]
File:1983-yamaha-it490-0.jpg|1983 Yamaha IT490
<br style="clear: left"/>
File:1983-yamaha-it490-1.jpg|1983 Yamaha IT490
File:1983-yamaha-it490-2.jpg|1983 Yamaha IT490
File:1983-yamaha-it490-3.jpg|1983 Yamaha IT490
File:1983-yamaha-it490-4.jpg|1983 Yamaha IT490
File:1983-yamaha-it490-5.jpg|1983 Yamaha IT490
</gallery>
 
==1984 Yamaha IT 490==
<gallery mode='packed-hover'>
File:1984-yamaha-it-490-0.jpg|1984 Yamaha IT 490
File:1984-yamaha-it-490-1.jpg|1984 Yamaha IT 490
File:1984-yamaha-it-490-2.jpg|1984 Yamaha IT 490
File:1984-yamaha-it-490-3.jpg|1984 Yamaha IT 490
File:yamaha-it490-1984-1984-1.jpg|600px|1984 Yamaha IT 490
File:yamaha-it490-1984-1984-0.jpg|600px|1984 Yamaha IT 490
</gallery>
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.
 
==See Also==
*[[Yamaha IT200]]
*[[Yamaha IT250H]]
==References==
{{reflist}}
 
{{Yamaha}}
 
[[Category:Yamaha motorcycles|IT490]]
[[Category:Yamaha IT series]]
[[Category:Enduro motorcycles]]
[[Category:1980s motorcycles]]

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