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1982 XJ750J Maxim Spark Issue (Maybe?)

Discussion in 'XJ Technical Chat' started by CowboyBiker, Feb 4, 2023.

  1. CowboyBiker

    CowboyBiker New Member

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    Howdy Y'all!

    I have been encountering an issue with my '82 Xj750 Maxim that I've been fighting with off and on for several months. For some reason, cylinders 2 and 3 are not firing with as much strength as 1 and 4. I checked the coils and they are both good, the compression all seems to be in order, the valves are all within specs, the wiring seems in order, and the plugs are all good. Could this be an issue with the CDI box? Any advice from y'all on this issue would be greatly appreciated. Thanks!
     
    CowboyBiker, Feb 4, 2023
    #1
  2. Dan Gardner

    Dan Gardner Well-Known Member Premium Member

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    Yes, could be the TCI box. I had a similar issue where all the sudden I had a two cylinder bike.

    The tricky part is getting one to test with…
     
    Dan Gardner, Feb 5, 2023
    #2
  3. CowboyBiker

    CowboyBiker New Member

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    Thanks for the response! Yeah that's pretty much what's happening to mine. If you don't mind my asking, how did you end up fixing the issue?
     
    CowboyBiker, Feb 7, 2023
    #3
  4. bensalf

    bensalf Well-Known Member

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    why dont you swop the coils over ,and see it the problem follows the coil
     
    bensalf, Feb 7, 2023
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  5. CowboyBiker

    CowboyBiker New Member

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    I forgot to mention it in the original post, but I did switch them over and the coil was fine.
     
    CowboyBiker, Feb 7, 2023
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