Join Date: Mar 2008
Location: Port Townsend, WA
Bikes: xtracycle, electric recumbent, downtube folder and more
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You are saying you are building an electric motorcycle? If so, you need to find a different forum since this is about bicycles but I don't know about that.
I have used a 500 watt (I am assuming that is what you meant, not amps) inline motor and it has enough power to get up our hills but only if I pedal. If you don't have the ability to pedal (a big mistake in my opinion, since it adds so much to the versatility), I doubt a 500 watt motor would get you far at any speed. You will probably have to get it registered and licensed without the ability to pedal. Even my 750 watt motor which is plenty fast and powerful on my recumbent, wouldn't be good enough without pedaling.