Home Forums General Karting Discussion Iame leopard bad crank and crank case question?

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    • #55384
      baruch fishman
      Participant

      Hi Guys,

      Take a look at these pics and explain if you can how can this happen?

      i realized that i bent the crank somehow someway so i decided to open the motor and see what is going on and i found this:

      i am just very curious on what could cause this to the crank case and crank itself .

      http://prntscr.com/8qy2vm

      http://prntscr.com/8qy36u

      http://prntscr.com/8qy3c2

       

      Thanks

    • #55403
      Greg Wright
      Participant

      It doesn’t take a lot of twist in the crank assy for it to rub the cases.

      Greg Wright
      Rapid Racing Inc.
      Vintage B-Stock Pilot
      "When in doubt Gas it, It won't help but it ends the suspense."

    • #55486
      Walt Gifford
      Participant

      The shaft has to seat on the bearings. You might need some bearing shims. Crank should have at least .025″ wall clearance.

      Gif

      FAA certified jet engine and aircraft technician,
      Nicholson Speedway class champion 2001,
      Yamaha KT100 Service Center,
      41 years karting experience

    • #55510
      FREDDY SANDOVAL
      Participant

      Crank shaft may have become lose, or someone lost kart at a corner and spun backwards, and while going backwards kept pushing the throttle, instead of waiting till fully stopped.

      Or someone simply just accidentally dropped the engine, and landed on the shaft bending it, knocked it out of trueness or round.

    • #55696
      baruch fishman
      Participant

      Thanks for the input !

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