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  • engine stuck

    From Pork@21:3/105.1 to All on Tue Sep 14 16:08:38 2021
    I think this will qualify for DIY. I have an old 1991 Honda CR125 dirtbike that
    I found in a barn. It has been sitting there for at least 20 years. Other than
    being very dusty, the engine is stuck. I have pulled the spark plug and dumped
    Marvel Mystery Oil in it to let it soak. So far it is still stuck tight. Any DIY potions you guys use to unstick a piston from the bore?
    ---
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  • From HSM@21:2/162 to Pork on Tue Sep 14 18:55:32 2021
    On 14 Sep 2021, Pork said the following...

    I think this will qualify for DIY. I have an old 1991 Honda CR125
    dirtbike that I found in a barn. It has been sitting there for at least 20 years. Other than being very dusty, the engine is stuck. I have
    pulled the spark plug and dumped Marvel Mystery Oil in it to let it
    soak. So far it is still stuck tight. Any DIY potions you guys use to unstick a piston from the bore?

    MMO is the best potion for the job. On bikes I usually put it in a higher gear and rock it back and forth to try to loosen things up.

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  • From pork@21:3/105.3 to HSM on Wed Sep 15 06:26:02 2021
    soak. So far it is still stuck tight. Any DIY potions you guys use to unstick a piston from the bore?

    MMO is the best potion for the job. On bikes I usually put it in a
    higher gear and rock it back and forth to try to loosen things up.

    That's a great idea! Thanks I will give that a try.
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  • From StormTrooper@21:2/108 to pork on Thu Apr 21 13:00:01 2022
    MMO is the best potion for the job. On bikes I usually put it in a higher gear and rock it back and forth to try to loosen things up.

    That's a great idea! Thanks I will give that a try.

    The only other potion I see getting a regular run is ATF..

    ST

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  • From 2twisty@21:3/166 to StormTrooper on Thu Apr 21 19:50:05 2022
    The only other potion I see getting a regular run is ATF..

    Seafoam down the spark plug holes and let it sit a while, then start rocking the crank to break the rings loose. Make sure that cam's wel lubed too in case the sieze is there and not in the rings.

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  • From StormTrooper@21:2/108 to 2twisty on Fri Apr 22 08:07:46 2022
    seafoam?

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  • From 2twisty@21:3/166 to StormTrooper on Fri Apr 22 09:58:34 2022
    seafoam?

    https://seafoamworks.com/

    Great stuff.

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  • From poindexter FORTRAN@21:4/122 to StormTrooper on Fri Apr 22 17:44:00 2022
    StormTrooper wrote to 2twisty <=-

    seafoam?

    It's a fuel/oil addative.


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  • From HSM@21:2/162 to 2twisty on Mon Apr 25 12:27:46 2022
    On 21 Apr 2022, 2twisty said the following...

    The only other potion I see getting a regular run is ATF..

    Seafoam down the spark plug holes and let it sit a while, then start rocking the crank to break the rings loose. Make sure that cam's wel lubed too in case the sieze is there and not in the rings.


    I've heard of Marvel Mystery Oil used to unstuck seized engines, but not seafoam.

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  • From k9zw@21:1/224 to HSM on Tue Apr 26 14:02:34 2022
    On 25 Apr 2022, HSM said the following...

    On 21 Apr 2022, 2twisty said the following...

    The only other potion I see getting a regular run is ATF..

    Seafoam down the spark plug holes and let it sit a while, then start rocking the crank to break the rings loose. Make sure that cam's wel lubed too in case the sieze is there and not in the rings.


    I've heard of Marvel Mystery Oil used to unstuck seized engines, but not seafoam.

    It is worth considering Mouse Milk or Kroil in this particular use. Mouse Milk I've used more on smaller frozen delicate things, but I've used Kroil on some mightily bound things.

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  • From IrishMonk@21:1/101 to Pork on Tue Aug 2 03:58:33 2022
    pulled the spark plug and dumped Marvel Mystery Oil in it to let it

    Just curious, did you ever get this repaired? and if so what worked for you?

    IrishMonk

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  • From pork@21:3/105 to IrishMonk on Wed Jan 25 10:47:08 2023
    On 02 Aug 2022, IrishMonk said the following...

    pulled the spark plug and dumped Marvel Mystery Oil in it to let it

    Just curious, did you ever get this repaired? and if so what worked for you?

    IrishMonk

    Not yet. I have several other projects ahead of this one. I try the kickstarter about once a month to see if it is free, So far the kickstarter wont budge. I tried putting it in gear and rocking the bike back and forth. No luck. Looks like i can either try some other concoctions ( someone in another forum suggested CLR) or pull the motor and put it on the bench and start tearing it down. The bike itself is pretty rough overall. I am not sure it is worth a lot of effort or expence to rebuild.

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