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GR650 bobber project

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    GR650 bobber project

    I've been working on a 1983 hardtail bobber project for a while now, a little at a time. The compression is off in both cylinders. 120 in the left and 80 in the right. Bike started and ran pretty well, before I removed the motor to do some welding on the frame last Winter. Just curious how the compression could be off after removing the engine?

    Scudder

    #2
    Have you checked the valve clearances?
    http://img.photobucket.com/albums/v5...tatesMap-1.jpg

    Life is too short to ride an L.

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      #3
      You running an open pipe on this bobber of yours? Rejetted the carbs appropriately?
      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

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        #4
        Suppose I should have mentioned.

        1. Running PODS
        2. Pretty much open pipes (cherry bomb mufflers)
        3. Installed a rejet kit specifically designed for the set up.

        No. I haven't checked the valve clearances. Suppose I'll start there.

        Scudder

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          #5
          Checked the valves. Two were off a bit. Adjusted them. The bike has potential life as it is chugging now, like it wants to start. Before the valve adjustment there was nothing. Just the starter. So... I think when I have some time I might be able get'er to start. Got to find some time first however.

          I think a major issue is the proper air to fuel. PODS...

          Scudder

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            #6
            Messed around with the pods tonight and the bobber started. Thanks for the suggestions.

            Scudder

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