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    Crapped valve

    Last summer, my bike started sputtering, stalling, and generally running poorly. I rebuilt & cleaned the carbs, three times, each more thoroughly than the last. Still running crappy, I checked compression, and found cyl#4 leaking into the exhaust. I have a ton of money in this bike, 3X what I will ever see out of it and can't put much more into it. I have not had the head off yet to confirm, but a burnt valve is the only explanation I can come up with.

    Anyone know where I can get the valve and head gasket cheap (or at least not too expensive)? Or should I just part this bike out and cut my losses? The only thing this bike will need once the motor is running is some seals for the front forks, some body work (that I really don't care about) and an oil change.

    #2
    Originally posted by rtuite View Post
    Last summer, my bike started sputtering, stalling, and generally running poorly. I rebuilt & cleaned the carbs, three times, each more thoroughly than the last. Still running crappy, I checked compression, and found cyl#4 leaking into the exhaust. I have a ton of money in this bike, 3X what I will ever see out of it and can't put much more into it. I have not had the head off yet to confirm, but a burnt valve is the only explanation I can come up with.

    Anyone know where I can get the valve and head gasket cheap (or at least not too expensive)? Or should I just part this bike out and cut my losses? The only thing this bike will need once the motor is running is some seals for the front forks, some body work (that I really don't care about) and an oil change.
    First of all, Welcome to GSR.

    Now, since this is your first post and nobody knows anything about you or your bike, ...

    WHAT BIKE ARE YOU TALKING ABOUT???

    .
    sigpic
    mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
    hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
    #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
    #2 son: 1980 GS1000G
    Family Portrait
    Siblings and Spouses
    Mom's first ride
    Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
    (Click on my username in the upper-left corner for e-mail info.)

    Comment


      #3
      And, have you ever checked valve clearances/lash adjustment (depending on the bike, of course).

      Comment


        #4
        Originally posted by DanTheMan View Post
        And, have you ever checked valve clearances/lash adjustment (depending on the bike, of course).
        They ALL need to be checked. Only the method changes.

        .
        sigpic
        mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
        hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
        #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
        #2 son: 1980 GS1000G
        Family Portrait
        Siblings and Spouses
        Mom's first ride
        Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
        (Click on my username in the upper-left corner for e-mail info.)

        Comment


          #5
          What these guys aren't explaining, the valve clearances tend to tighten with miles, as the valves recede into the head the clearance between the valve stem and the cam gets smaller.
          Thinner shims or turning the screw adjuster is required to maintain the correct clearance, depending on which model GS you have.

          If it isn't done, the clearance gets to zero, the valves don't shut completely, and the bike starts to run poorly, a compression test will read low. Keep going and a burnt valve is sure to follow.

          Hopefully you caught it in time and it's just an adjustment problem.
          http://img.photobucket.com/albums/v5...tatesMap-1.jpg

          Life is too short to ride an L.

          Comment


            #6
            There are lots of people about with spare engine parts but obviously, the model of bike is necessary.

            Unfortunately, burned valves are common with GS bikes because so many people neglect the maintenance. GS Suzuki's have seriously tough engines and will typically run over 100,000 miles with proper maintenance. Neglect the valves though and the engine will crap out in less than 20k.
            Ed

            To measure is to know.

            Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

            Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

            Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

            KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

            Comment


              #7
              Sorry, dumb moment.

              The bike is a 1986 GS 550 ES. Valve lash is the first thing I checked after reading low compression on that cylinder.

              Sorry, I had a dumb moment. I forgot model and such. I was a member before. but had not logged in for a while so my account got deleted.

              Comment


                #8
                Nobody?

                No clues where I can get the valve(s) and gaskets to finish this? Or is the silence to mean I should scuttle the bike?

                Comment


                  #9
                  Originally posted by rtuite View Post
                  No clues where I can get the valve(s) and gaskets to finish this? Or is the silence to mean I should scuttle the bike?
                  Why not post in ad in the Parts Wanted forum?
                  Ed

                  To measure is to know.

                  Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                  Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                  Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                  KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

                  Comment


                    #10
                    I did at one point, last fall. I wanted to get this done over the winter, but nobody replied. I suppose I can post another. Can't hurt right? Either that or post the parts for sale.

                    Comment

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