CDI, welding and the motorized bicycle.

Discussion in 'Motorized Bicycle General Discussion' started by Bikeguy Joe, Sep 2, 2008.

  1. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    4
    Question for the welders among us- Will it hurt the CDI if I weld on the bike as built.

    The "borrowed bike's" pedal fell off today and the crank and pedal both are stripped. I was gonna hit it with the welder, but I wanted some input before I did anything.

    Thanks.
     
  2. Pablo

    Pablo Master Bike Builder & Forum Sponsor

    Joined:
    Dec 28, 2007
    Messages:
    3,658
    Likes Received:
    5
    Not sure. But for that exact reason I would isolate it.
     
  3. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    4
    Heck, if I gotta do that much to it, I'll jst swap out the crank for another I have here.

    I thought I could get away with a 5 minute fix.
     
  4. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    4
    Instead it will be a 7 minute fix.
     
  5. Pablo

    Pablo Master Bike Builder & Forum Sponsor

    Joined:
    Dec 28, 2007
    Messages:
    3,658
    Likes Received:
    5
    I didn't tell you NOT to try it. We (the readers) are curious if it would fry the CDI unit. :p (need a little popcorn eating guy to watch and wait)....
     
  6. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    4
    I'll do it and let you know....I have an extra CDI.
    Empirical testing is always best!
     
  7. BlueCollarBike

    BlueCollarBike New Member

    Joined:
    Aug 14, 2008
    Messages:
    51
    Likes Received:
    0
    I Have done it a few times and I Guess got lucky...Nothing bad happened .

    I happen to have Just a few extras Around.:D

    MurphyLaw...If you have no spare Please beware.;)

    I should probably Pull off the electronics It only takes Tem minutes or so.

    Cheers:)

    Bob
     
  8. Dave31

    Dave31 Moderator
    Staff Member

    Joined:
    Mar 1, 2008
    Messages:
    11,207
    Likes Received:
    17
    I tacked my fenders and had no problem with the CDI....as long as you got a good ground on the welder I don't see a problem. If anything just disconnect the wiring.
     
  9. davidhore

    davidhore New Member

    Joined:
    Aug 8, 2008
    Messages:
    3
    Likes Received:
    0
    G day. With any form of electric welding on the bike it would be necessary to disconnect the blue and black wires between the cdi unit and the motor to be safe .
     

Share This Page