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Thread: Compression #'s ?

  1. #1
    GSDCW Guest

    Default Compression #'s ?

    Looking at purchasing an 83' GS1100E with around 27,000 miles. What should I look for in good compression #'s ?

  2. #2
    Nessism's Avatar
    Nessism is offline Forum LongTimer GSResource Superstar
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    Values in the FSM. 150psi would represent a respectable engine.
    http://members.dslextreme.com/users/bikecliff/
    Last edited by Nessism; 04-18-2020 at 10:25 PM.

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    Get your numbers on a warm engine, if possible, be sure to hold the throttle wide open while checking.

    Actual numbers can be interesting, but consistency across the four is just as important.

    .

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  4. #4
    GSDCW Guest

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    Prior owner measured all cylinders for compression. All were even at 150 +

    Purchased Bike
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    Quote Originally Posted by GSDCW View Post
    Prior owner measured all cylinders for compression. All were even at 150 +

    Purchased Bike
    Rule #1: Never believe Previous Owner without verifying.....

    09 Kaw C14 Rocket powered Barcalounger
    1983 GS1100e
    82\83 1100e Frankenbike
    1980 GS1260
    Previous 65 Suzuki 80 Scrambler, 76 KZ900, 02 GSF1200S, 81 GS1100e, 80 GS850G

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    Quote Originally Posted by bobgroger View Post
    Rule #1: Never believe Previous Owner without verifying.....
    What could happen if I did believe everything the PO told me?

    Could I get a tan? Slightly warm? Or burned to a crisp?
    1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

    2016 XL883L Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

  7. #7
    Nessism's Avatar
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    Quote Originally Posted by Rob S. View Post
    What could happen if I did believe everything the PO told me?
    What WOULD happen is you would get what you deserve.

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    That's why I can't help smiling looking at my 11E. The gods were smiling on me when I bought her.
    Last edited by Rob S.; 04-19-2020 at 03:03 AM.
    1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

    2016 XL883L Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

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    Quote Originally Posted by bobgroger View Post
    Rule #1: Never believe Previous Owner without verifying.....
    Rule #1A - Previous Owners LIE !

    Not ALWAYS - but often enough for it to become a rule .
    Hopefully you found the exception to that rule
    Currently in the Stable :
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    After. I purchased my 11E (running nicely) and then got it running even better, I asked my mechanic if we should check compression.

    He said, "No. It runs great, you love it, right? Knowing compression could only cause you heartache."

    I like that. I'm not even going to check the air in the tires any more!
    1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

    2016 XL883L Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

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