Piston Roller Bearing play

Discussion in '2-Stroke Engines' started by jtmiyake, Sep 19, 2009.

  1. jtmiyake

    jtmiyake Member

    Curious if anyone knows how loose the roller bearing should fit into the crank connecting rod. I have the needle bearing type and it seemed to me to have excessive play. This engine is not that old so I'm just wondering if this is normal.

  2. arceeguy

    arceeguy Active Member

    This is kind of tough to judge by feel, but the radial play should be barely perceptible. A visual inspection should reveal any wear like flat spots on the rollers or unevenly worn wear surfaces. (piston pin, con rod small end)
  3. Al.Fisherman

    Al.Fisherman Active Member

    I took a new engine apart (after break in) and there is more play in these bearings then you'd think. Kind of sloppy for me but the engine runs great.