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  • pick up coils

    Hope this topic can be dropped in this forum and has not been beat to death, but I am new here and I need to get the scoop ASAP -sorry for all the details.

    I have been working on my bike (78 XS11, 8K mi).
    the bike had 3k when I got it - with most of that coming over the first three years. The guy I got it from ran some kind of high test gunk cleaner through the bike - it took a while to run that stuff through. After a few sets of plugs things wer going pretty well. Dropped in a new set of plugs, but they eventually fouled off. Another new set it took awhile but they eventually fouled off to.

    Currently The carbs have been removed/cleaned up, timing adjusted, tuned, fuse block upgrade, have moved up to a hotter plug from a 6 to 5 - all this being done by someone with a great deal more knowledge than I about XS11. I am learning as we go...

    There is a minor hesitation right around 3000 RPM - as soon you crack the throttle and get past that minor hesitation she takes off like a rocket. after putting the new plugs in -ran about 25 mi - the two outside cyl plugs are burning a little dark. We Swapped them out with the center cyl and they burn clean - same problem with the outside cyl. After runnig ohm checks on the rest of the wiring it looks like the pick up coils are the problem- specifically the fine wire.

    would ya agree? should I be looking at anything else? The pick up coil wires have not been spliced ( repir tips), but my buddy thinks you could just soldier them directly.

    thanx
    Riding is not a hobby....

  • #2
    hi MtTremperman

    If you found an open/short in one wire, I'd double check the others. Will cause poor running for sure.

    Would also check for vac leak. Hoses/boots/caps etc..


    mro
    Welcome to XSland

    btw
    Low miles on your scooter. Post a pic so we can see what she looks like

    Comment


    • #3
      there was a open - right or wrong it got soldiered - the meter says its fine, but the slicing wire technique sounds appealing if it proven fix. what type of resistance should it be showing?

      The vac looks solid - everything else has been checked as best we can. this is all per Bob the retired Yamaha mechanic I ran into on the streets - I am on information overload right now as this is the first time I have really gotten into it with this bike.

      the bike is pretty clean - came with a aftermarket exhaust and seat. I was promptly rear ended by a car -dented the fender - hit and run. The bars are a little bent, but she is oil tight & everything works - i will get piture

      danimal
      (alias MtTremperman)
      Riding is not a hobby....

      Comment


      • #4
        After a painful learning process with the pick up coils on my 78E, including a new set, I have leaned a couple of things. A quick and easy check to see if you do have a problem is to start the bike with the engine at idle and the cover to the coils removed. Move the pick up coil assembley gently counter clockwise. If you have a wire going bad the bike will start to stumble or even die. The wires can check out perfectly fine when the bike is not running , but need the movement of the coils to show if they are bad.
        I just had an episode with the "new" set I put on, but with advice from TC I've think I got a handle on it. Good luck!!
        78E ... Gone but not forgotten
        2006 Kawasaki Concours....just getting to know it

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        • #5
          danimal,

          The coils should show between 600 and 800 ohms each.

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          • #6
            1978 XS11

            Heres my ride

            Riding is not a hobby....

            Comment


            • #7
              Link to photo attached

              No luck uploading my first image - so here is the link i fyou are interested in seeing the bike.

              1978 XS11 with 8150 miles


              http://www.photodump.com/viewer/MtTremperman/xs11a.html

              Danimal
              Riding is not a hobby....

              Comment


              • #8
                Not only CLEAN but Shiny too

                You got a very good looking ride there.
                Seat looks comphy too.


                mro

                btw
                640 x 480 fits on screen w/o scrolling

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