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  1. #1

    What's Considered To Be Good Compression?

    Can anyone give me a range for good compression?


  2. #2
    Formerly Ultra250 TN Aquaholic6801's Avatar
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    depends on engine, but an variation of @ 5% from each cylinder is considered out of specs....

    You are looking for consistancy arcoss all cylinders...........

  3. #3

    Join Date
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    100 to 150 depending on the engine. The important thing is how the difference cylinders compare to each other.

    For an exact figure refer to the service manual.

  4. #4
    all stock skies are 120. thats the 800/1200/1300 motors.
    modified motors will be more

  5. #5
    Quote Originally Posted by scittb View Post
    all stock skies are 120. thats the 800/1200/1300 motors.
    modified motors will be more
    ...that's not quite right. The 800 has 145-150 stock. FYI

  6. #6
    120-150........anything lower than 110 I would be weary...

  7. #7
    The 800 is 120 Trust me!!!!!!!!

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