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Difference between revisions of "Yamaha IT490"
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→1984 Yamaha IT 490
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==1984 Yamaha IT 490== | ==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. | 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== | ||