Compression test results.... that bad?

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  • Anonymous
    #1

    Compression test results.... that bad?

    So we did the compression test. The GS650G has been sitting for years and not been running. So we had to do a 'cold' test.

    Results:

    105
    60
    105
    115

    Then we did a wet test:

    180
    175
    160
    175

    I think the battery was starting to drain, so I don't know if the second set are 100% accurate. Plus we were using the hold in rubber tipped gauge, and it kept on popping and shooting out oil!

    How bad are the results? Do I need new rings and pistons?

    --
    wiseguy
    Tags: None
    • Anonymous
      #2
      It might be a simple case of stuck rings. Get it running for a few days or a week, then do the test again.

        Comment

        • Anonymous
          #3
          Can you explain what "stuck rings" means?

          Thanks!

            Comment

            • Jeff Tate
              #4
              The ring(s) may have gotten somewhat glued to one spot by old gummy oil and all and won't conform to the cylinder walls which equals no or low compression.

                Comment

                • Anonymous
                  #5
                  Ah, ok make sense.

                  My numbers went up so much.. maybe the oil I added freed things up a bit...

                    Comment

                    • Billy Ricks
                      #6
                      The oil had the effect of closing up tolerances. Ride it a while and see if the dry numbers improve.

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