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Difference between revisions of "Yamaha IT490"
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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'> | |||
File:1983-yamaha-it490-0.jpg|1983 Yamaha IT490 | |||
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]] | |||