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Old 10-14-2014, 02:42 PM   #4 (permalink)
Grant-53
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Changing the gearing will help that. A larger gear at the engine and a smaller gear at the rear wheel allows higher road speed at a lower engine rpm. A fairing reduces the need for power to overcome air drag. Three to five horsepower may be all that is needed.

The Genuine Stella scooter with a 4 spd gearbox is rated at 140 mpg.
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