3 piece crank

  1. Brent

    3 piece crank issue

    So my 4 stroke engine kit that I bought from http://www.bicycle-engines.com/ came with this 3 piece crank set and no matter how I put it on or how tight I get it I take it for a spin around the block and when I return it becomes loose where the large bearing nut on the left side. Today I was...