No spark

Discussion in '1st & 2nd Generation 1983-1989' started by ritewing, Jul 13, 2010.

  1. ritewing

    ritewing New Member

    Joined:
    Jul 7, 2010
    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Georgia
    Actually I get an intermitten spark, but mostly nothing. When I check resistance between blu/w and blu pulse gen. coupler, I get nothing...same with yellow/w and yellow leads---nothing. Does this mean the pulse generators are bad?
    Plus, how do I check the spark units? Thanks for any help.
     
    ritewing, Jul 13, 2010


    This site may contain affiliate links for which VFRworld may be compensated
    #1
  2. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

    Country:
    United States
    Joined:
    Oct 5, 2009
    Messages:
    7,831
    Likes Received:
    91
    Trophy Points:
    78
    Location:
    Colorado Front Range
    Map
    assuming this is your '84 700?

    More history would probably be helpful. Has the thing ever ran for you? When did the problem start? Had you performed any other maintenance when this happened?
     
    tinkerinWstuff, Jul 13, 2010


    This site may contain affiliate links for which VFRworld may be compensated
    #2
  3. ritewing

    ritewing New Member

    Joined:
    Jul 7, 2010
    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Georgia

    I bought it last week. Just now beginning to work on it. First thing I did was to check for spark, because the guy I got it from said it was not sparking. Am getting 3.5 @primary coils. It sparks every now and again with plug pulled and grounded. I pulled apart cdi units, they look fine. I am supposed to be getting a pulse reading of 480,,, but get no reading at all. Pulse units look fine,no broken wires that I can tell.
    I am going to remeasure air gap and see if that helps.
     
    Last edited: Jul 13, 2010
    ritewing, Jul 13, 2010


    This site may contain affiliate links for which VFRworld may be compensated
    #3
  4. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

    Country:
    United States
    Joined:
    Oct 5, 2009
    Messages:
    7,831
    Likes Received:
    91
    Trophy Points:
    78
    Location:
    Colorado Front Range
    Map
    don't forget to check thumb kill switch wiring. The 1st gen will crank with the right thumb switch in the off position. A problem or poor connection there could be a possibility.
     
    tinkerinWstuff, Jul 13, 2010


    This site may contain affiliate links for which VFRworld may be compensated
    #4
  5. ritewing

    ritewing New Member

    Joined:
    Jul 7, 2010
    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Georgia
    Kill switch


    I have checked it, seems fine, will check again,though.
     
    ritewing, Jul 13, 2010


    This site may contain affiliate links for which VFRworld may be compensated
    #5
  6. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

    Country:
    United States
    Joined:
    Oct 5, 2009
    Messages:
    7,831
    Likes Received:
    91
    Trophy Points:
    78
    Location:
    Colorado Front Range
    Map
    Have you checked more than one plug? The front head and rear head are independent systems - separate coils and pulse generators. The only thing in common with the system is the kill switch. I consider my knowledge on this topic to be limited. I've seen threads with similar problems on the 1st gen in the last year. No doubt someone with more experience with this will chime in soon. Scanning thread titles in the 1st/2nd gen forum may be your friend. The forum is slow in the summer....
     
    tinkerinWstuff, Jul 13, 2010


    This site may contain affiliate links for which VFRworld may be compensated
    #6
  7. ritewing

    ritewing New Member

    Joined:
    Jul 7, 2010
    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Georgia
    kill switch fine

    kill switch is getting 12 v. with switch in run and key on...nothing with switch on kill.
    So switch is fine. I'm thinking while not getting any reading at all between pulse gen. leads, the pulse gens are bad,,,dunno, I could be wrong. I do not know or understand electricity. I do know that it will shock the &*%^ out of you!
     
    ritewing, Jul 13, 2010


    This site may contain affiliate links for which VFRworld may be compensated
    #7
  8. malaguchi

    malaguchi New Member

    Country:
    United States
    Joined:
    Nov 24, 2009
    Messages:
    63
    Likes Received:
    0
    Trophy Points:
    6
    Another thought. Be sure your battery has a good charge on it.
     
    malaguchi, Aug 27, 2010


    This site may contain affiliate links for which VFRworld may be compensated
    #8
  9. jafo

    jafo New Member

    Joined:
    Apr 7, 2010
    Messages:
    75
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Ithaca NY
    sounds like the CDI units are bad I had same problem took it apart found nothing wrong I replaced and it ran
    there is no way to check units out there is some advertised on eBay good luck let us know if you get it running.
     
    jafo, Sep 2, 2010


    This site may contain affiliate links for which VFRworld may be compensated
    #9
Related Topics

Share This Page