Evo Engine Swap?

Discussion in 'Engine, Fuel and Exhaust' started by upland117, Jul 14, 2014.

  1. upland117

    upland117 New Member

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    I am looking at picking up a spare early Evo motor for my 1998 Softail to tinker around on. It is a 1985 with no primary or tranny. Will I be able to bolt my 1998 primary and tranny to it or will I have issues? Thanks a lot.
     
  2. tourbox

    tourbox Senior Member

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    It fine. The early EVO's had a cracking/leaking problem, on the cases, from what I've heard. I could be wrong on that though.
    tourbox
     
  3. tourbox

    tourbox Senior Member

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    Also the early ones weren't head breathers with Umbrella valves. You would have to convert your air cleaner or modify the newer one.
    tourbox
     
  4. Jack Klarich

    Jack Klarich Expert Member

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    Right on the money with this advice:s
     
  5. upland117

    upland117 New Member

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    Great info, i'm in no rush so maybe I'll wait and find a later Evo. Thanks
     
  6. FishHunter

    FishHunter Active Member

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    The problematic years seemed to have been in the early '90's.
    The 90* corner that was established during machining the r/cylinder tappet block pad, is the area where those crack. No joy.
    Yep, that earlier Evo, is a case-breather like a Shovel, and in 1992, the head breathers were introduced, and yes, as already mentioned, they can be converted very easily.:)