What's the compression suppose to be? '72 Whisker Sachs 47


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Well that about sums it up, I have a '72 Arctic Cat Whisker with a Sachs 47cc and I've looked all over the internet and I need to know if 85psi is good compression or what it should be.
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Great-looking bike. I did a google search for 2-stroke compression tests and pretty quickly found a couple of sites that said 85 psi usually indicates a worn engine. They said a good engine will run 140-150 psi.