GT/T500 ignition died. Any subs?

Discussion in '2 smokers' started by huronbikes, Sep 10, 2012.

  1. huronbikes

    huronbikes n00b

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    I was pondering over how to deal with a Suzuki GT500 and its dead CDI / PEI / Caveman Transistorized Ignition module. Has anyone tried using a GM HEI module to trigger the coils on that bike, or any other sort of devious hackish substitution?

    If you guys haven't seen it before, http://home.comcast.net/~loudgpz/GPZweb/Ignition/GPZgmHEImod.html demonstrates building an ignition for the GPz 4s and the 750 twins, though both are 4 strokes and I'm not exactly sure what factors need to be accounted for when trying to duplicate this for a two stroke.

    Alternatively, is there an aftermarket option that doesn't cost a butt and a nut?
    #1
  2. Twin-shocker

    Twin-shocker Long timer

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    Try a 6 pin pit bike CDI unit...........get the wiring right and it may well work. The 5 pin type work fine on AC CDI systems.
    #2
  3. Andyinhilo

    Andyinhilo Long timer

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    The way i read it, it should work fine, one module per coil. The 4 cylinder setup would be the same since those bike are a wasted spark system (it fires at TDC every revolution).
    #3
  4. stainlesscycle

    stainlesscycle Long timer

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    what about the timing curve? ....i would assume the t500 cdi retards timing at high rpm. the hei just keeps advancing.......... could be a recipe for disaster - you may be able to use just about any cdi that works off the same pickup style (inductive i assume?) there's lots of cheap ones out there that have no timing curve, which might work.... ebay dc cdi and you might find a $10 unit that will work. the moped guys do it... if you can find one with a 2 stroke curve that would be much better..
    #4
  5. Tim McKittrick

    Tim McKittrick Long timer

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  6. mach1charlie

    mach1charlie To old to fall off

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    I did two HEIs on a kz1000, worked great
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  7. anotherguy

    anotherguy unsympathetic

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    Try Ignitech. Reasonable prices and good support even though it's a Czech company. Look at the CDI-P2 for your bike.
    #7
  8. killfile

    killfile 49/50

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    Powerdynamo is great because it replaces everything electrical for running, but the Czech craftsmanship leaves a LOT to be desired. My rotor didn't have anything that looked like a proper timing mark. Managed to get it running, but it confirmed my suspicions that there was no mark in that location!
    #8