Announcement

Collapse
No announcement yet.

gs1000et spark problems

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    gs1000et spark problems

    hi guys , i'm having some issues with my gs1000 i recently bought , i took a chance and bought it unseen from photos on ebay , the seller sounded a genuine guy but turns out he was very flattering with its discription and as often is the case it looked much better in the pics , its not that bad but someones stripped it down and had the frame powdercoted then rebuilt with new stainless bolts and thrown away the originals ! i know its not that bad but it bugs me ! worse though is the wiring loom , someones had a real go at it and it has those cheap looking connectors everywhere rather than the correct type plugs etc , amazingly though everything seems to work !
    my main problem seems to be a spark issue , when it first arrived i started it up and it did run but very roughly ! not on all cylinders most of the time , ive now found that its down to a spark problem although it must have been intermittent at first as it was coming on all four at times it now seems like ive lost spark to the middle two (2 + 3 ) althogether now ! its the 1000et model that i have so it has electronic ignition , i suspected a coil at first so swapped the feed wires and got spark so i dont have power coming up to coil 2 + 3 , after checking for broken wires etc i then thought the problem either lies in the cdi unit or the pick up coils , i looked into replacements and although both parts are still available the cdi unit was around £450 and the pick up around £200 , the cdi unit looked rather suspect as the metal casing was very rusty and the little circuit board inside looked like it was corroded ! so when i spotted an nos one on ebay with a buy it now of £100 i grabbed it in the hope of a cure , sadly it hasnt helped infact things seem to be worse now with only a very weak spark at one of the plugs but this is the same which ever cdi box is plugged in , im now pointing the finger at the pick up , like a said i can buy a replacement for £200 but i would like to know that this is definately the problem before spending more money ! does this sound like a pick up problem ? do they fail ? is there anything else i can look at that ive over looked ? thanks in advance andy

    #2
    heres a couple of pics of the bike


    ive now fitted a harris works exhaust and those red r+r rear shocks have to go !
    i just missed out on a nice original front mudguard as well but for now i'd be happy just to get it running !

    Comment


      #3
      Buying a bike sight unseen- you must love adventure! anyways, welcome and have a look see at Mr. Matchless's ignition testing in this link.



      avoid the temptation to just buy parts until you've narrowed down the likely suspects.
      1981 gs650L

      "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

      Comment


        #4
        After trouble shooting the problem, if replacement is needed, as Dyna S is cheaper and more reliable alternative to OEM ignition

        a basic question - are you getting 12V at the coils?
        1978 GS 1000 (since new)
        1979 GS 1000 (The Fridge, superbike replica project)
        1978 GS 1000 (parts)
        1981 GS 850 (anyone want a project?)
        1981 GPZ 550 (backroad screamer)
        1970 450 Mk IIID (THUMP!)
        2007 DRz 400S
        1999 ATK 490ES
        1994 DR 350SES

        Comment


          #5
          Originally posted by Big T View Post
          After trouble shooting the problem, if replacement is needed, as Dyna S is cheaper and more reliable alternative to OEM ignition

          a basic question - are you getting 12V at the coils?
          to be honest im not sure , how do i test this ? i do have a multimeter but have very little experience or knowledge of them , i did use it to do some continuity tests to check for a broken wire but thats about as far as i go with it , what will this tell me if there isnt 12 volts at the coils ? i do know that power isnt coming up one pair of coil feed wires

          Comment


            #6
            ok , a big thanks for the link that was posted , i havent cured it yet but i have found out that i do have power coming to both coils , 12 volts at each , the tests also suggest that the pick up and igniter box are also ok , this leaves me with coils , the tests say i should get 30-35 ohms when i put the probes in each spark plug cap from the same coil , im only getting around 12 , also says when i test the coil feed wires i should have 2-5 ohms and i cant get a reading at all , the frame has been powder coated so im wondering if its a bad earth or if the coils are shot ? would a bad earth give me the poor reading im getting ?

            Comment


              #7
              Best to unplug coils and first test for primary resistance across the spade (or bullet) connectors on each coil- should be 3 to 5 ohm. Then remove plug caps from spark plug wires and test across them (stick meter probes in plug wires)- plug wire to plug wire should be about 12 kohms ( 12000 ohms- make sure you understand meter scales). It's tricky to measure over plug cap to plug cap due to corrosion, but it might be 24 kohms to 35 kohms.
              1981 gs650L

              "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

              Comment

              Working...
              X