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Thread: Compression TEST - Result's are in !

  1. #1
    Join Date
    Mar 2006
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    Oregon
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    Question Compression TEST - Result's are in !

    I just did a Compression Test ...

    1984 Honda ATC 70 - 4 Stroke

    Result's - 120 PSI

    I warmed up the motor , choke ON & OFF , Throttle WIDE OPEN !

    What do you guy's think ?

    Is it time for a re-build ?

  2. #2
    rustyhondas's Avatar
    rustyhondas is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    thats fine for a used motor.

  3. #3
    Join Date
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    Utah
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    MY '81 200 runs at 120 psi. Its supposed to be 154psi +-14 but I'm 5280feet above sea level, so that makes a little difference. Personally I think its an ok compression. Its when it gets like to 90psi you should start thinking about rebuild. IMO.
    A few wheelers, + an
    '73 Honda 49cc Mini Trail
    '85 200 Big WHEEL

    "Despite the cost of living, its still popular."

  4. #4
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    if you rebuild it, look at a 90 bigbore kit! more powa and stuff.
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  5. #5
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    Any one in here with a ATC 70 Manual , What does it say for Compression Range ?

    Post Up , if you have a ATC 70

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