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failure

  1. B

    ZBox Series 4 Needle Bearing Failure

    Needle bearing in my 2800km Zbox S4 66cc engine has broken up. I have no idea when the first needle shattered but it stayed in the cage for quite a while as it has eaten a small chunk out of the wrist pin. Then, at some point a chunk of roller has - somehow - made it up the transfer port where...
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