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Lost my paper- aargh

Discussion in 'XJ Technical Chat' started by shack, Aug 25, 2012.

  1. shack

    shack New Member

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    Hi all, when instecting and checking my coils I took them off and removed the caps, making a note of where every lead from every coil goes to.

    Putting it back together a week later with new plugs I can't find the paper!!!

    So sitting on the bike I have a LH coil with two leads, if the Cylinders are numbered 1,2,3,4 going from L to R which does the LH lead go to
    Which Cylinder does the RH lead on the LH coil go to

    and

    Looking at the RH coil, where does the LH lead go to, and I guess the last lead will be self evident

    Hope it all makes sense, it's a simple enough request, just seems very wordy
     
  2. karl

    karl New Member

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    Not sure what bike you have. Looking at the manual for a 750 RH the manual shows the coil wires in order of cylinders. So for the LH coil, 1st coil wire (furthest to the left) would be for No. 1, the second for No.2, and for the 2nd coil the first wire would be for No. 3, and last for No. 4.

    Unless you replaced the coil wires the shorter wires should be for the inner two cylinders. I don't have my tank off or I would double the manual against the bike.
     
  3. maverickbr77

    maverickbr77 Member

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    left goes to cylinders 1&4 right coil goes to 2&3 doesn't matter which side of the coil goes to which plug as the xjs use a lost spark system meaning that 1&4 are always fired together and the same with 2&3
     
  4. karl

    karl New Member

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    Guess I should have looked at the bike instead of the manual. You are correct 1 and 4 go to left coil. Sorry for bad info shack. I still have factory labels on my wires so no questions where they go.
     
  5. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    This is correct.
     
  6. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    Even more important is how the coils are wired to the TCI, as that is what really differentiates a "right" from a "left" coil.......the coils themselves are pretty much identical (the plug wires are longer on the #1/4 coil than on the #2/3 coil originally):

    NOTE:

    * on the primary side of the coils, the proper colored leads from the TCI must be hooked up to the proper coil......see below. However, it does not matter which of these two wires go to either position on the coils.

    - the ignition coil for the #1/#4 spark plugs is mounted on the left side of the bike, and has the solid orange (ground) wire and the red-with-white-tracer-stripe (hot) wire input leading to it.

    - the ignition coil for the #2/#3 spark plugs is mounted on the right side of the bike, and has the solid grey(ground) wire and the red-with-white-tracer-stripe (hot) wire input leading to it.
     
  7. shack

    shack New Member

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    All plugged in and fired up, and running on all 4 cylinders (wahoo) next problem is it is reluctant to settle down to an idle and has gives a plume of black smoke when blip the throttle, didn't do this before I changed the plugs (went back down a grade to recommended plug) and cleaned all the connections etc
    So over fuelling ? (complete guess) could this be float ht a little (but not massive) high? or how would changing the plugs back to (new) ones at a higher temp as someone suggested they changed up one to fix a problem (po long time ago)
    Jets were cleaned
    Thanks
     
  8. tskaz

    tskaz Active Member

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    What about the rest of the carbs?

    While you can sometimes run a hotter plug to fix a slightly rich mixture, it's not recommended.

    Stay with the original plug for the bike, get all the carbs clean, and adjust mixture and float height, then sync.
     

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