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| | | | Motorized Bicycle Trouble Shooting Use this area to post problems that may arise that you could use some help in figuring out what is wrong with their bicycle motor and what needs to be done to achieve top performance. | CDI test - help verify my results Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle Trouble Shooting forum. So I've currently got no spark. I did a test on my CDI that should have told me whether ...  | | 
07-15-2008, 10:51 AM
|  | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Longmont, CO
Posts: 1,076
| | CDI test - help verify my results So I've currently got no spark. I did a test on my CDI that should have told me whether or not it was bad. Test showed mine was bad. I was just wondering if someone with a working CDI could run this test just to make sure my test even works at all.
Basically you need a ~6v source. I used 4xAAAs wired in series (because that's what I had handy), but you could use one of those big 6v batteries, a 6v ac/dc adapter, even a 9v battery should work.
So here's what you should do:
connect the black wire to the (-) on the battery.
Ground the spark plug threads to the (-) on the battery.
Tap the blue wire on the (+) of the battery.
Each time you touch the blue wire to the battery, you should get a spark. I did not get a spark.
Someone want to help out and verify these results? If it works, this would be an easy way to test your CDI.
Thanks | 
07-15-2008, 11:32 AM
|  | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Longmont, CO
Posts: 1,076
| | Re: CDI test - help verify my results ok maybe not a 9v, I don't want to be responsible for breaking someone's cdi  | 
07-15-2008, 01:29 PM
| | Master Motorized Bicycle Builder | | Join Date: Jun 2008
Posts: 144
| | Re: CDI test - help verify my results In theory that sounds good but i do not know anything about theese CDI's to know if that will work. And also i would keep at around 6v since that is what theese things put out. My Bike don't sprk so at lunch i may try this to see what i get. | 
07-15-2008, 01:41 PM
|  | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Longmont, CO
Posts: 1,076
| | Re: CDI test - help verify my results Let me know what you find.
I can't afford to just start throwing parts at this thing. My wife is already upset that I got a used one and am having problems. Blah. | 
07-15-2008, 02:01 PM
| | Master Motorized Bicycle Builder | | Join Date: Jun 2008
Posts: 144
| | Re: CDI test - help verify my results Is'nt that why we marry them........LoL Mine has not said anything yet but i can tell in her face she don't approve. | 
07-15-2008, 02:19 PM
|  | MODERATOR | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 4,244
| | Re: CDI test - help verify my results I don't know where you heard that, but I just tested a known good CDI and I got nothing....I wouldn't suggest anyone else do it either.
I used a battery charger set at 6v and 10 amps.
__________________ If it ain't broke, and you mess with it long enough, it will be. | 
07-15-2008, 02:33 PM
|  | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Longmont, CO
Posts: 1,076
| | Re: CDI test - help verify my results Odd. I've done it before with a small car version to shock the crap out of people.
Dangit, there goes my great idea. | 
07-15-2008, 02:34 PM
|  | MODERATOR | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 4,244
| | Re: CDI test - help verify my results Maybe with a coil, but not the cdi.
__________________ If it ain't broke, and you mess with it long enough, it will be. | 
07-15-2008, 02:50 PM
|  | HS Math Teacher | | Join Date: Jun 2008 Location: arkansas
Posts: 377
| | Re: CDI test - help verify my results i tried it...no spark for me...then again, i don't know if my cdi is good or bad :-/ | 
07-15-2008, 02:52 PM
| | Master Motorized Bicycle Builder | | Join Date: Jun 2008
Posts: 144
| | Re: CDI test - help verify my results Thanks Joe, I had nothing realy to loose so I did try it nothing Then Pablo was kind enough to Post Ohm Readings and mine is Bad. well now we see how much support i do get from Revolution cycles.....XXXXX Your fingers for me.
Greg | | Thread Tools | | | | Display Modes | Linear Mode |
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