Rock_Steady Posted January 15, 2014 Share Posted January 15, 2014 Does anyone know what the compression levels are for a bog standard zed? Not a rev-up. Would like to give it a compression test. Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted January 15, 2014 Share Posted January 15, 2014 There really are no set compression levels due to the variation in gauges etc. However circa 160 psi will not be far off the mark. The main thing to look for is that all six compression readings are similar. Alex. 1 Quote Link to comment Share on other sites More sharing options...
Jez @ H-Dev Posted January 15, 2014 Share Posted January 15, 2014 (edited) Standard pressure is 13 bar, 185 psi Min pressure of 10 bar, 142 psi Max difference between cyls of 1 bar, 14 psi Engine hot, all plugs out, full throttle, battery in good condition. Edited January 15, 2014 by Jez 2 Quote Link to comment Share on other sites More sharing options...
WhackyWill Posted January 15, 2014 Share Posted January 15, 2014 Really depends on mileage and how you have looked after you Zed, but as Alex said about !60psi on all pots would be acceptable within a few psi 1 Quote Link to comment Share on other sites More sharing options...
Sam Mcgoo Posted January 15, 2014 Share Posted January 15, 2014 As Alex said it will vary with gauges and temperature etc... As an example - I have tested my engine twice with a cheapish gauge from a motor factor First about 3 years ago @ 16k miles results were all around 175psi +/- 5psi with a stone cold engine. Second time just a couple of weeks ago @ 31k miles results were all around 215psi +/- 5psi with a hot engine. As long as they are even, all is good. 1 Quote Link to comment Share on other sites More sharing options...
Sam Mcgoo Posted January 15, 2014 Share Posted January 15, 2014 Standard pressure is 13 bar, 185 psi Min pressure of 10 bar, 142 psi Max difference between cyls of 1 bar, 14 psi. Good to know. Quote Link to comment Share on other sites More sharing options...
Rock_Steady Posted January 16, 2014 Author Share Posted January 16, 2014 thanks for the replies guys. My zed has 70K. I've had it for a month but haven't driven it yet due to spraying a new bumper. Will give it a test and fingers crossed all is good. Quote Link to comment Share on other sites More sharing options...
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