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  1. #1

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    XL 800 compression

    I'm looking at a 2001 XL 800. I did a compression test and got exactly 110 in each cylinder. I can't find what it should be.... I have read it should be anywhere from 120 to 150 .... What is the real #


  2. #2

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    nobody has this answer??

  3. #3
    xxx2's Avatar
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    You probably won't find a concrete number. The key is uniformity between cylinders and if you start to see an inequality of more than 10-15% then you probably need to redo the topend. Usually you will have hard starting, idling issues along with being down on power and not reaching full rpm's under a load.Are you experiencing a problem or just wanting to know for gp's? Most manuals don't list compression numbers just acceptable variances. Are you sure your performing test correctly (ie. Unplugging power valve servo and holding throttle open)

  4. #4
    its 120, you dont have to unplug the servo though, but the throttle does need to be wide open when cranking.

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