The setup that robnewyork is suggesting will do the job for you. I also weigh in at 250, (
), and I did an E300 project with a 36v 1000w Unite motor, YK43B controller and 11/80 gears.
I was living in Montreal at the time, which has some fairly steep hills. Not only would this thing climb straight up them with me on it, my son almost literally drove it up a wall. I say almost, because it dumped him on his butt and then
started climbing the wall when he didn't let go of the throttle!
I used a Dean's plug for my power switch, (I'll try to find a picture of how I did that), instead of the switch that rob is suggesting, but the controller that he is recommending looks just like my YK43B. I went with 12v 10ah for the battery pack, but I modified the bottom box to fit them and the controller. I also made a custom deck for mine, but peruse the forum, some people have been able to defy the rules of physics and stuff everything under the original deck.
If you go with the same gear ratio that I did, you will be able to ride for a good 20 - 30 minutes, but at a max of 12 mph, (with fresh batteries and the wind at your back!
) But be careful, this setup has a lot