first electric bike

Discussion in 'Photos & Bicycle Builds' started by vax, Dec 14, 2007.

  1. vax

    vax Guest

    Hello, here's my first attemt to build something electric. The frame is from "Delta" moped and front fork is a cheap chinese one...
    I use 300W 24V motor, 25amp controller and four 17Ah deep cycle batteries which I dont have yet.
    The problematic thing about it is the transmission. I have 11 teeth 402 chain front sprocket, so the rear sprocket must be pretty big; the other option is to make two-stage chain transmission, but it's the tricky solution because of the frame's dimensions.

  2. azbill

    azbill Active Member

    gonna be cool when you finish it :D:D
    good luck with your gearing problem :)
    I like the way you suspended the seat
    reminds me of Augi's sb2.1 :D
  3. Alaskavan

    Alaskavan Guest

    It looks like an interesting ride.
    Last edited by a moderator: Dec 14, 2007
  4. Dockspa1

    Dockspa1 Guest

    Hey Vax, they had a 80 tooth #25 sprocket on ebay a couple of days ago. might still be there. don't know if this will get you where you want to be ratio wise. Looks like your bike might be a little heavy so you will probably want use the jack-shaft gearing for low end torque.
    I just put a 24 Volt on my wifes tricycle but it was a hub motor.
    Just some info.