engine swap

Discussion in 'Other Service and Maintenance' started by oldkat1320, Mar 2, 2012.

  1. oldkat1320

    oldkat1320 New Member

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    I am wanting to change my 1983 flht shovelhead motor with a evolution motor,I already have the stock 5 speed transmission .the motor cases look the same,but not sure the primary is the same,I have not tore it apart yet to see.any tips???
     
  2. Breeze3at

    Breeze3at Well-Known Member

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    I've not had first hand experience with this, but I remember that the seat post or frame back bone need mods to accept the taller evo engine.
    Google something like " evolution motor in shovel head frame", there's bound to be much info available. And remember there are 2 different primary systems for a big twin. The short FLH and FXR, and the long Dyna and Softail primarys.
     
  3. oldkat1320

    oldkat1320 New Member

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    thanks Breeze3at,good info,it seems that the evo will fit all flt,flht fxr frames.