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Discussion Starter #1
I have a 1996 polaris xcr 600 sp and I was wondering what a good compression would be in each cylinder. Mine was 100 115 115.
 

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115 is fine. around 120 125 is normal. 100 is borderline, you could benefit from a top end job.
 

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You could probably get away with just a honing and putting in new rings. Depends on how much wear your cylinders have.
 

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ya thats a big lose itn he one cylinder id look into a top end job u want them to be close to the same
 

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i have 3 sleds. 95 xlt 95 xcr 600 96 xcr 600. All run 120 . You have to much variance, time for a rebuild for sure. At least you have a jump on it, by doing the check, but 15 percent is too much.
 

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Polaris allows 10-15% variance in compression, So he is not that bad.
 

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The 440 both test out at 140 after 2-3 pulls, 120 each on first.
 

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Most of the 440's with trails heads all run at 140-150 psi. Alot depends on the gauge.
 
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