cold compression test

Discussion in 'Touring Models' started by iamron6113, Oct 27, 2014.

  1. iamron6113

    iamron6113 Member

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    can anyone please tell me how to turn engine over at starter (bypass ignition) so I can perform a cold compression test?
    Thanks
    Ron
     
  2. dolt

    dolt Senior Member Contributor

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    Why? I have never done that to perform a compression test. Make sure you have a fully charged battery; remove spark plugs; connect tester; hold throttle wide open and spin the motor through 5-7 revolutions or until the gauge stops moving. If carbureted, remove the carb from the boot before test.:hii
     
  3. Jack Klarich

    Jack Klarich Expert Member

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    Dolt has you covered here, if compression is low add some oil thru plugs holes and re read and compare your readings
    Harley Davidson Forums
    Read here
     
  4. iamron6113

    iamron6113 Member

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    Thanks, Gents . . appreciate it.
    Test came out good. Both cyl s hitting around 170 lbs. . . very GOOD NEWS for me.
     
  5. iamron6113

    iamron6113 Member

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    Bypass electronic ignition - - otherwise could burn it out.
     
  6. Jeff Klarich

    Jeff Klarich Well-Known Member Contributor

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    The few revolutions you have to do to check the compression won't hurt the electrical system.
     
  7. dolt

    dolt Senior Member Contributor

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    No, it couldn't. If that would happen I would have burnt out more than my share by now.:hii