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Thread: what would cause my lower crank bearing to fall apart?

  1. #1
    Join Date
    Nov 2003
    Location
    Oswego, IL
    --
    1,858

    what would cause my lower crank bearing to fall apart?

    just wondering what caused my lower crank bearing to fall apart?
    1974 atc 90 project underway cuzzztom

    1985 atc 110 for sale

    84 200s all original got off the first and only owner
    new carb
    maybe putting my 200x cam in it but not sure

    old trike
    1985 200x
    12.1 piston
    oil cooler kit
    white bors cam
    super trapp exhaust
    uni clamp on air filter
    350x front end

  2. #2
    Join Date
    Oct 2002
    Location
    Northeast
    --
    17,493
    You mean the big end connecting rod bearing?? They just plain die, just like main bearings. Usually because people don't mind putting in top ends but are terified of "splitting cases". Usually happens right after you rebuild the top end too.
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country

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