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Old 12-22-2014, 11:27 PM   #4 (permalink)
Grant-53
Master EcoModder
 
Join Date: Feb 2010
Location: Elmira, NY
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A 5kw motor is 6.5 hp and the motor rpm, torque curve data will help determine the optimum gear ratio. The overall weight and air drag will determine the power needed to go 45 mph. Check all state and local laws before spending money.
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