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compression
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Posted by: thumper492

what should the compression be on a mxr90 before you rebuild it

any help would be great thanks

Posted by: hookedonpain

I believe it to be 165 psi.,that is what ours was just after we bought it,and just after our rebuild.Be careful though,I got that reading and two days later the skirts were cracked off the piston,in other words this may not be a true indication of what is going on below the rings.

Posted by: thumper492

thanks for the help