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1980 GSX250 - no spark

Discussion in 'Suzuki 250cc Twins' started by Frankster, Sep 28, 2015.

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  1. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Reg/rec has nothing to do with it. You can run a total loss ignition if you want to. You are describing the alternator when you are talking about the 3 yellow wires.
    1. trigger (Signal Generator [1] in your diagram)
    2. TCI Unit
    3. Coils
    4. 12 volts
    If you have zero spark and you have greater than 11 volts at the coil positive whilst cranking then the TCI unit or the ignition trigger is the most likely problem. It is highly unlikely that both coils would fail at the same time. Complete the static resistance test for the ignition trigger and check the wiring for bad connections. That will leave the TCI unit.
     
    maelstrom, Oct 18, 2015
    #41
  2. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Electronic components have a service life. You can reasonably expect that a 25+ year old motorcycle is going to need its electronic components replaced soon. It would be a good idea to have some spare items on hand. The fact that a lot of these TCI units are being made new in China is a good thing and if these are acceptable quality units then these businesses deserve our support. Without them we would have to resort to aftermarket generic systems which are quite expensive.

    Good reading about motorcycle electrics here. Please read it @Frankster . It has all of the information that you need and a lot of simple tests that you can do.
    http://www.jetav8r.com/Vision/IgnitionFAQ.html

    cheers
    Blair
     
    maelstrom, Oct 18, 2015
    #42
  3. Joker

    Joker See "about me" for contact details. Contributing Member

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    Joker, Oct 18, 2015
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  4. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Thanks Blair. I will have a read.
     
    Frankster, Oct 19, 2015
    #44
  5. Ben Mulligan

    Ben Mulligan Well-Known Member Premium Member Contributing Member

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    M
    my new battery at rest with accessories off at full charge was 13.4
     
    Ben Mulligan, Oct 19, 2015
    #45
  6. Evo

    Evo Well-Known Member

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    In regards to the static test in the ignition trigger. This is where I found that what was quoted in the workshop was not the results I was getting in all 3 that I was testing. All 3 were very similar but well off the quoted results. I just figured that it would be a massive fluke for all 3 to be faulty and read the same and in the end it works fine.

    On a side note if yours is faulty I have a couple of spare!!!
     
    Evo, Oct 19, 2015
    #46
  7. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Thanks EVO, I may need to take you up on that offer. I'm interstate for the next few weeks, so won't get a chance to test until early November. Will keep reading and watching YT videos while absent.

    Cheers
     
    Frankster, Oct 20, 2015
    #47
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