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Thread: How do you know when a CDI goes bad?

  1. #1
    mkramm is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Jul 2003
    --
    224

    How do you know when a CDI goes bad?

    Just curious, if there are tell tail signs. Like wont run at all no spark, or is there levels of intermittent?

  2. #2
    Join Date
    Jul 2003
    --
    936
    ittl act just like if the stator goes out, it wont run, no power
    Wanna race? ;-)
    85' Tecate (still looking for entire front brake asembly...)
    bonanza mini-bike
    if you cant ride with the big boys...put it back on the trailer

  3. #3
    Join Date
    Sep 2002
    Location
    Goulais River, Ontario, Canada
    --
    90

    ...

    yeah she wont run, but actually when my cdi goes i can see a very small spark on the plug, i dont know, but it could be from left over charge in the coil or sumting, becasue they do work as a capasitor and hold voltage right? n e way thats what i noticed, and when i changed the cdi, it ran again...
    Thanks alot, Billy Bob (Bob Menard)
    E-bay- bobby-menard
    e-mail - das_boobie@hotmail.com


    1982 Honda 250R - PROJECT
    2 - 1984 Honda Big Red 200es
    1984 Honda 200s
    1985 Honda Big Red 250es
    1987 GMC C-1500 - Modded (Project Weekend Truck)
    1997 Polaris Indy XLT 600
    2004 Yamaha V-Max 1200
    2005 Ford F-150 Lariat

  4. #4
    Join Date
    Apr 2002
    Location
    s.w. michigan
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    6,500

    c.d.i.

    what kind of machine mkramm ???

    john

  5. #5
    TG is offline New to the board Arm chair racerNew to the board
    Join Date
    Jul 2003
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    23

    Re: ...

    Quote Originally Posted by Billy Bob
    , but it could be from left over charge in the coil or sumting, becasue they do work as a capasitor and hold voltage right? n...
    Thats coming from the capacitor in the CDi, it holds the charge. The coil doesnt hold any when the engine is still. Take that old CDI apart and look for the bad solder joints. Then when you fix them, got a spare cDI. If its broke, cant hurt it by taking it apart. Gonna break it more??? NOT!

  6. #6
    yamaha225dx is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Nov 2002
    Location
    South Dakota
    --
    199
    will the cdi work for a little while and then cut out after warmed or will it just not work?? my friends bayou is having problems....

  7. #7
    Join Date
    Oct 2002
    Location
    Shrewsbury, West Virginia
    --
    564
    You'll know when you're riding in the moutains and it quits and won't restart and you don't have a cell phone with you. Nah, if I think there is the slightest problem with my electrical devices, I pull out my manual and tester and and start checking them all.
    Justin ~hondaATCman~

    '82 Honda ATC 110
    '81 Honda ATC 250r (Summer Project)
    '87 Suzuki LT 250r Quadracer - Very Modded...FAST!!
    '03 Yamaha Big Bear 400 4x4
    '85 Ford Bronco II 4x4 2.8 V6

  8. #8
    Join Date
    Jul 2003
    --
    936
    i was riding my trike and my stator went out 3 miles from my house....and no phone....i had to push it 3 miles back to my house
    Wanna race? ;-)
    85' Tecate (still looking for entire front brake asembly...)
    bonanza mini-bike
    if you cant ride with the big boys...put it back on the trailer

  9. #9
    Join Date
    Oct 2002
    Location
    Shrewsbury, West Virginia
    --
    564
    And how many dirty words did you say on your way back home??? Thats some damn nasty bad luck. Hope mine never does that!!
    Justin ~hondaATCman~

    '82 Honda ATC 110
    '81 Honda ATC 250r (Summer Project)
    '87 Suzuki LT 250r Quadracer - Very Modded...FAST!!
    '03 Yamaha Big Bear 400 4x4
    '85 Ford Bronco II 4x4 2.8 V6

  10. #10
    Join Date
    Jul 2003
    --
    936
    i lost count :-P but i know it was quite a few and it was dark also....
    Wanna race? ;-)
    85' Tecate (still looking for entire front brake asembly...)
    bonanza mini-bike
    if you cant ride with the big boys...put it back on the trailer

  11. #11
    roger86200x is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jul 2003
    Location
    Western New York (Buffalo)
    --
    348
    Lol, that sucks! I had a chain break about 3 miles out in the mud.... it sucked I started back and got about half way...then i said the hell with it and left it and walked, but then my brother came by and we rode home and got a rope.... also I had a throttle break twice and had 2 idel home once 1 mile and once 5 miles...lol very slow... and THEN I had my 85 200x stall and it dont like to restart hot...no tool box either to change plug! so I have had my share too LOL

    But anyways I have heard of a CDI go bad and still work, but very very shittily (my own word) lol but it will start but not run for crap!
    1984 Honda ATC 250r
    Bored .020 over Wiseco, Answer silencer, fresh motor, New connecting rod and balanced crank, Boyesen 2 stage power reeds

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