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  1. #1

    Join Date
    May 2007
    Miami FL

    Can someone please tell me what the cylinder compression for a N/A 4-tech should be?

    Just got a 04 Sportster and did a compression test on it and got 175 psi on all 3. This is just spinning the engine with a closed throttle. I am just curious about the number. Boat runs good.

  2. #2
    GOT BOOST? Dockside's Avatar
    Join Date
    Dec 2008
    Ontario, Canada
    My 03 sportster 155hp was 175psi....

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