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    Dead cylinder at idle

    I have a dead cylinder at idle but it starts coming in while riding and getting on the gas.2nd cylinder from the left sitting on the beast...Any suggestions?.....Plug maybe?

    #2
    Originally posted by Green Farmer View Post
    I have a dead cylinder at idle but it starts coming in while riding and getting on the gas.2nd cylinder from the left sitting on the beast...Any suggestions?.....Plug maybe?
    Check your fuel petcock vacume line , you may have gas in the vacume line which means the fuel cock is bad and flooding that cyl.
    1984 GS1100GK newest addition to the heard
    80 GS 1000gt- most favorite ride love this bike
    1978 GS1000E- Known as "RoadKill" , Finished :D
    83 gs750ed- first new purchase
    85 EX500- vintage track weapon
    1958Ducati 98 Tourismo
    “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
    If it isn't going to make it faster or safer it isn't worth doing

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      #3
      Could also be a clogged pilot jet circuit.

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        #4
        There is a lot of gas on the carb.I was thinking it was possibly spark shortage.

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          #5
          Originally posted by Green Farmer View Post
          I was thinking it was possibly spark shortage.
          Well, does #2 have spark?
          http://img.photobucket.com/albums/v5...tatesMap-1.jpg

          Life is too short to ride an L.

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            #6
            Originally posted by tkent02 View Post
            Well, does #2 have spark?
            A small one.

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              #7
              Small, just like #3?
              Or is this a two cylinder engine?
              http://img.photobucket.com/albums/v5...tatesMap-1.jpg

              Life is too short to ride an L.

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                #8
                Originally posted by tkent02 View Post
                Small, just like #3?
                Or is this a two cylinder engine?
                It is a 78 gs 1000...#2 seems to have the weakest spark...i was trying to think of all scenarios.

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                  #9
                  OK, then disregard the thing about the petcock, that's on #3 on your model.
                  Two and three share the same ignition and coil, if the spark is strong on three and weak on two there is your trouble. See if you have a bad spark plug cap or corroded spark plug wire connections. It also could be the spark plug itself.

                  Try this, swap the plug wire between 2 and 3 to see if the trouble moves with the wire, or stays with the plug.
                  http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                  Life is too short to ride an L.

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                    #10
                    Originally posted by tkent02 View Post
                    OK, then disregard the thing about the petcock, that's on #3 on your model.
                    Two and three share the same ignition and coil, if the spark is strong on three and weak there is your trouble. See if you have a bad spark plug cap or corroded spark plug wire connections.

                    Could be just a lame spark plug, have you swapped 2 and 3 to see?
                    I have not...i will try that next...it has new wires,dyna coils and ignition.I have only owned it 9 days...trying to work out the bugs.thank you very much.I also said 2nd cylinder from the left while sitting on the bike....im not sure what number that is.

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                      #11
                      2nd from left is number 2. 1 is under clutch hand and 4 is on the far right under your brake hand
                      Cowboy Up or Quit. - Run Free Lou and Rest in Peace

                      1981 GS550T - My First
                      1981 GS550L - My Eldest Daughter's - Now Sold
                      2007 GSF1250SA Bandit - My touring bike

                      Sit tall in the saddle Hold your head up high
                      Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
                      and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"

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                        #12
                        Originally posted by koolaid_kid View Post
                        Could also be a clogged pilot jet circuit.
                        That would be my first thought. Or way out of synch.
                        sigpic Too old, too many bikes, too many cars, too many things

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                          #13
                          what type of carbs are they...cv or slide.

                          I had the same but with slides. checked all fuel and leccy circuits only to find nmumber 2 slide had dropped slighty so was shut at idle whilst the other 3 had the normal slide gap. all fine when throttle was open though.


                          just a thought.

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                            #14
                            78 would be VM carbs.

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