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| Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles |
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09-02-2008, 05:00 PM
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Godfather of Motorized Bicycles
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Join Date: Jan 2008
Location: Ashtabula county, Ohio
Posts: 10,003
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CDI, welding and the motorized bicycle.
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.
__________________
If it ain't broke, and you mess with it long enough, it will be.
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09-02-2008, 05:04 PM
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Master Bike Builder & Forum Sponsor
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Join Date: Dec 2007
Location: Duvall, WA PNW
Posts: 3,282
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Re: CDI, welding and the motorized bicycle.
Not sure. But for that exact reason I would isolate it.
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09-02-2008, 05:06 PM
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Godfather of Motorized Bicycles
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Join Date: Jan 2008
Location: Ashtabula county, Ohio
Posts: 10,003
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Re: CDI, welding and the motorized bicycle.
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.
__________________
If it ain't broke, and you mess with it long enough, it will be.
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09-02-2008, 05:06 PM
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Godfather of Motorized Bicycles
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Join Date: Jan 2008
Location: Ashtabula county, Ohio
Posts: 10,003
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Re: CDI, welding and the motorized bicycle.
Instead it will be a 7 minute fix.
__________________
If it ain't broke, and you mess with it long enough, it will be.
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09-02-2008, 05:20 PM
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Master Bike Builder & Forum Sponsor
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Join Date: Dec 2007
Location: Duvall, WA PNW
Posts: 3,282
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Re: CDI, welding and the motorized bicycle.
I didn't tell you NOT to try it. We (the readers) are curious if it would fry the CDI unit.  (need a little popcorn eating guy to watch and wait)....
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09-02-2008, 09:00 PM
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Godfather of Motorized Bicycles
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Join Date: Jan 2008
Location: Ashtabula county, Ohio
Posts: 10,003
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Re: CDI, welding and the motorized bicycle.
I'll do it and let you know....I have an extra CDI.
Empirical testing is always best!
__________________
If it ain't broke, and you mess with it long enough, it will be.
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09-03-2008, 09:37 AM
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Motorized Bicycle Senior Member
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Join Date: Aug 2008
Posts: 51
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Re: CDI, welding and the motorized bicycle.
I Have done it a few times and I Guess got lucky...Nothing bad happened .
I happen to have Just a few extras Around. 
MurphyLaw...If you have no spare Please beware. 
I should probably Pull off the electronics It only takes Tem minutes or so.
Cheers 
Bob
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09-05-2008, 02:52 PM
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Super Moderator
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Join Date: Mar 2008
Location: Tucson, AZ
Posts: 8,976
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Re: CDI, welding and the motorized bicycle.
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.
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09-08-2008, 06:25 AM
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Motorized Bicycle Newbie
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Join Date: Aug 2008
Location: ALBURY NSW AUSTRALIA.
Posts: 3
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Re: CDI, welding and the motorized bicycle.
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 .
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