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Crankcase enigma

Discussion in 'XJ Technical Chat' started by Olewildbill, Mar 7, 2026 at 6:17 PM.

  1. Olewildbill

    Olewildbill New Member

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    Working on unraveling a mystery.. bike has clearly been laid over.. it's missing the case cover plate and the case itself has been "doctored" at some point presumably post-dump..the VIN on motor doesn't match frame so I'm aware it'snot original.. question i have is due to the coloration of the top half vs bottom half.. how likely is this motor a Frankenstein's monster? Is there a way to know if the lower portion of the crankcase is original to the bike? 20260307_180412.jpg
     
    Olewildbill, Mar 7, 2026 at 6:17 PM
    #1
  2. Dan Gardner

    Dan Gardner Well-Known Member Premium Member

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    The top case halves are painted - the bottoms are not. So the color variation doesn't mean too much. Could be a frankenmotor, but not necessarily.
     
    Dan Gardner, Mar 8, 2026 at 12:49 PM
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    k-moe and Olewildbill like this.

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