Changing the (imo) ugly convex stock primary on many BDMs

Discussion in 'Technical' started by No H2O, Nov 9, 2018.

  1. No H2O

    No H2O Active Member
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    I've always liked the way the Harley and AIH primarys looked, with the small and large bubbles sticking out (first picture).
    Most BDMs have those convex circles that I'm not a big fan of (second picture).
    Is it possible to just change out the primary cover or are the hole patterns etc different so you have to change the entire primary (read upgrade to an open primary)?
     

    Attached Files:

  2. KaptinAmerika

    KaptinAmerika Well-Known Member

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    You can but it requires changing the primary and transmission due to the proprietary nature of the transmission case. Then you will likely have to deal with battery box issues etc. We're developing some Special Edition Big Dogs that have a different and far superior drive train to the OEM Big Dog and it requires replacing the transmission mount plate. So in general I don't think it's a simple bolt up situation.
     
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  3. SKOGDOG

    SKOGDOG One of the old ones.
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    Why would you want to disguise your Big Dog as a Harley? Haha The earliest and most recent years of Big Dogs have the Harley-type primary, we middle dog owners have the concave.
    Too many (unschooled) people ask if mine is a Harley as is. Wouldn't want to add to their confusion.
    Sure wish I was closer to see what Captain is doing with drive trains, having experienced several clutches and a couple of transmission rebuilds.
    But to each his own. I like my concave primary just fine.
     
  4. mjsk9

    mjsk9 Active Member
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    Agree.... For my taste, I like the sleeker look of the "concave" vs. the "clunkier" look of a bolt on that sticks out. As Rick said, to each his own!
     
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  5. pknowles

    pknowles semi-retired...---... GURU C7Z06...---...
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    typically, they sell cheaper to a dealer who in turn, can pass on some of the savings to their customers.. That's the route that I took.
     
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  6. Mickeetwo

    Mickeetwo Guru
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    Thanks for sharing :old2:
     
  7. Mickeetwo

    Mickeetwo Guru
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  8. what?

    what? Active Member

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  9. cdogg556

    cdogg556 Guru

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    :agree:
     
  10. Jwooky

    Jwooky Well-Known Member

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    IMO the DSSC is the best looking setup on the market.

    Why would anyone want the humpback old harley style is beyond me.
     
  11. bdm7250

    bdm7250 Guru
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    I prefer this look over all...:oldsmile:
    20170709_144219_resized_1.jpg
     
  12. pknowles

    pknowles semi-retired...---... GURU C7Z06...---...
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    Love the paint
     
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  13. bdm7250

    bdm7250 Guru
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  14. pknowles

    pknowles semi-retired...---... GURU C7Z06...---...
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    :oops:
     
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  15. bdm7250

    bdm7250 Guru
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    :D
     
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  16. pknowles

    pknowles semi-retired...---... GURU C7Z06...---...
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    And the trees are almost as green as the grin.
     
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  17. MossBerg590

    MossBerg590 Active Member

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    I wish I could afford that, love the look of the karata
     
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  18. bdm7250

    bdm7250 Guru
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    Very tough to find one, I got real lucky..
     
  19. Big D Florida

    Big D Florida Well-Known Member
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    That is the one mod I'd like to do someday.
     
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  20. Reddickracing

    Reddickracing Active Member

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