first electric bike

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

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  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.
    Images:
    http://static1.nagi.ee/i/p/130/90/032726550cb3f3_l.jpg
    http://static1.nagi.ee/i/p/130/90/03272661a8f2e3_l.jpg
     

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  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.
     
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