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Compression test results.... that bad?

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

Guest
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
 
It might be a simple case of stuck rings. Get it running for a few days or a week, then do the test again.
 
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.
 
Ah, ok make sense.

My numbers went up so much.. maybe the oil I added freed things up a bit...
 
The oil had the effect of closing up tolerances. Ride it a while and see if the dry numbers improve.
 
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