Editing Yamaha IT490
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{{Motorcycle | {{Infobox Motorcycle | ||
|name = Yamaha IT490 | |name = '''Yamaha IT490''' | ||
| | |image = [[File:yamaha-it490-1984-1984-1.jpg|frameless|1984 Yamaha IT 490]] | ||
|aka = IT 490 | |aka = IT 490 | ||
|manufacturer = Yamaha | |manufacturer = [[Yamaha]] | ||
|parent_company = | |parent_company = | ||
|production = 1983 - 1984 | |production = 1983 - 1984 | ||
|model_year = | |model_year = | ||
|predecessor = | |predecessor = | ||
|successor = | |successor = | ||
|class = Enduro | |class = [[Enduro]] | ||
|engine = Two stroke, single cylinder, read valve, air cooled | |engine = Two stroke, single cylinder, read valve, air cooled | ||
|bore_stroke = 86.4mm x 86.4mm | |bore_stroke = 86.4mm x 86.4mm | ||
|compression = 4.9:1 | |compression = 4.9:1 | ||
|top_speed = | |top_speed = | ||
|power = 35.0 HP (26.1 KW) @ 6000RPM | |power = 35.0 HP (26.1 KW) @ 6000RPM | ||
|torque = 30.98 ft/lbs (42.0 Nm) @ 5500RPM | |torque = 30.98 ft/lbs (42.0 Nm) @ 5500RPM | ||
|ignition = cdi | |ignition = cdi | ||
|spark_plug = {{sparkplug|NGK | |spark_plug = {{sparkplug|NGK B8EV}} '83-84 | ||
|battery = | |battery = | ||
|transmission = Gear box: 5-Speed <br> | |transmission = Gear box: 5-Speed <br> | ||
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|fuel_capacity = 3.59 Gallon (13.60 Liters) | |fuel_capacity = 3.59 Gallon (13.60 Liters) | ||
|oil_capacity = | |oil_capacity = | ||
|fuel_consumption = | |fuel_consumption = | ||
|turning_radius = | |turning_radius = | ||
|related = [[Yamaha IT125]], [[Yamaha IT175]], [[Yamaha IT200]], [[Yamaha IT250]], [[Yamaha IT350]], [[Yamaha IT490]], [[Yamaha IT500]], [[Yamaha | |related = [[Yamaha IT125]], [[Yamaha IT175]], [[Yamaha IT200]], [[Yamaha IT250]], [[Yamaha IT350]], [[Yamaha IT490]], [[Yamaha IT500]], [[Yamaha YZ500]] | ||
|competition = [[Honda CR500]], [[Kawasaki KX500]] | |competition = [[Honda CR500]], [[Kawasaki KX500]] | ||
}} | }} | ||
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==1983== | ==1983== | ||
[[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]] | |||
<br style="clear: left"/> | |||
</ | |||
==1984 Yamaha IT 490== | ==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]] | |||
File:yamaha-it490-1984-1984-1.jpg|600px|1984 Yamaha IT 490 | |||
File:yamaha-it490-1984-1984-0.jpg|600px|1984 Yamaha IT 490 | |||
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. | 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== | ==See Also== | ||
*[[Yamaha IT200]] | *[[Yamaha IT200]] | ||
*[[Yamaha IT250H]] | *[[Yamaha IT250H]] | ||
{{Yamaha}} | {{Yamaha}} | ||