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  1. #1

    Default Bigdog EVO 107 into a Santee hard tail frame

    Hey all! First time posing on here. Was referred by a friend. Thanks in advance for your help.
    I recently picked up and old but new Santee hard tail frame in trade. It came with the drivetrain out of an unknown Bigdog bike. I did get the speedo (and tons of other sh*t) that confirmed bike had around 4000 miles when he wrecked it.
    The engine is an EVO style 107” Bigdog. It fits my new frame just like it should.
    The transmission is another story, and the reason I need help. It is a Baker 6 speed OD also marked as a Bigdog. I know these trannies are amazing and was stoked to slap her in.
    Here is the problem. The frame has a center (seat) post that is structurally important to the strength. The transmission is designed to mount to the back of the engine using the two motor mount bolts. It also has what I would call a “pivot” style mount on the rear of the trans. The frame wants a transmission that mount from the bottom via a plate and bolts into the case.
    I hate to not use this Baker as I know it is a $4k transmission, but I am at a standstill. I need help identifying the trans that will bolt to my new frame and hopefully my inner Primary.
    I will try to post a few pics as well. And before anyone asks, I don’t know the model of the frame, or the model of the Bigdog donor bike (Big help, right?)
    Hoping to find a solution with a reasonable price that I might be able to cover by selling the Baker.
    Let me know your thoughts. Thanks
    Attached Thumbnails Attached Thumbnails BB2D2C9F-E7E8-43C0-97B3-71C85DB27952.jpg   B55DAD28-3D7B-4268-BBC2-6F8D3060BCC0.jpg   E2A2F9ED-166A-4760-ABE5-9C94A0FE3DE7.jpg   4116B6AB-3748-40A0-AE6D-7AC97B47CD1F.jpg  

  2. #2
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    You need to get a trans case and use all the guts from the tranny you have to put into the new case ..


  3. #3

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    Thanks Dragstew. Is there a specific case I need to fit the baker 6 speed guts in?

  4. #4
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    That kinda depends on how you want to go ... ?

    You can use a softail type case that has the starter ear on the case (Photo below) or use a custom case like the photo I posted ..(Above post)



    With having the 107 CI motor (You can do so much MORE with a 4 inch BORE), I strongly suggest having a ele starter ...



    So many ways you can go ...
    Last edited by Dragstews; 07-28-2021 at 8:18 PM.

  5. #5

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    Does it need to be a specific case for a 6 speed od? Or will the baker guts fit in a 5 speed case?

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    Sixth O.D. gear is housed in the door, you'll be keeping that door ...

    Here's an idea, give Baker Driveline a call (517-339-3835) have a pow-wow with a tech about what your wanting to achieve ..

    The case was/is available from many manufactures .. Jim's, S&S, Deltron, STD, Baker, Taiwan Best etc ...

    Last edited by Dragstews; 07-28-2021 at 8:05 PM.

  7. #7

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    You can transplant it into pretty much any 5 speed case, but it is not a bolt-in. You have to do some clearancing and some work to accommodate the six speed shift shaft. You need a copy of the instructions for the Baker 6 speed builder's kit. And the Softail transmission case as in D's pics above would probably be best, because you will need a good starter (if one is not included in your pile o' parts.)

    Jim

  8. #8
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    Say Jim ....

    Didn't the 107's use electric compression releases ??
    Think they was at 9 to 1 .... Still be a chore to kick unless you're built like the Hulk .. !!

    Last edited by Dragstews; 07-28-2021 at 7:25 PM.

  9. #9

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    Quote Originally Posted by Dragstews View Post
    Say Jim ....

    Didn't the 107's use electric compression releases ??
    Think they was at 9 to 1 .... Still be a chore to kick unless you're built like the Hulk .. !!

    Well, I'm sure not gonna kick it!

    I think the 107 was one of the emissions compliant motors (TUV and all that) and so, modest compression and a SHITTY cam. I don't know if they had the compression releases or not. Still gonna need a decent starter as you pointed out earlier.

    Jim

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    Quote Originally Posted by JBinNC View Post

    Well, I'm sure not gonna kick it!

    Jim
    That makes two of us ..

    The starter pick could have a hand on what case you will want to use ...

    Have a look at what these Boys have to offer ...
    ... /// http://techcycle.com/ \\\ ...
    Last edited by Dragstews; 07-28-2021 at 8:22 PM.

  11. #11

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    Tech Cycle has been my go-to, when you want it to START.

    Jim

  12. #12
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    If he's going to run a open belt, sure would be nice to tie the motor to the trans...
    .... Add big time support ....



    Mild to Wild ....

    You have now just stepped into Baskins-Robbins !!!

    Last edited by Dragstews; 07-28-2021 at 7:57 PM.

  13. #13

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    Thanks for the info. I did get the shiny chrome Bigdog starter in the box.

  14. #14

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    Not interested in an open belt. Wanted to run a closed primary/chain with a belt final drive. I got all the sprockets with the bike.

  15. #15
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    You may be able to come up with a complete softail primary used ..
    Guys that do a swap to a belt drive have no further need for the Oem parts ..
    91 to 99 would most likely be the best years to search for... 89 and 90 still ran the taper clutch hub and are problematic ...
    Last edited by Dragstews; 07-29-2021 at 4:07 AM.

  16. #16

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    Really surprised at you guys, evidently, he has an FLT/FXR rubber mount drivetrain. My friend started a Santee rigid frame build and had a rubber mount drivetrain from an older FLT, he chopped the seat post out of the frame and added a frame tube brace on the right side of the frame and mounts to grab the trans mount. This would allow use of his primary's, starter, etc. Would this be cheaper then transferring trans guts and other stuff???? Friend ended up with prostate cancer and I bought the roller, have over 2000 miles on it with a dresser drivetrain. Good luck
    Last edited by 1954bmw; 07-29-2021 at 5:52 AM.

  17. #17
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    If you can weld or know a good weldor that's easy and cheap without drivetrain fuckery as 1954bmw pointed out. Keep in mind the front and rear wheels must be centered so the drivetrain must be be straight and the final drive belt or chain line up.

    http://www.l-l-choppers.com/ll-hardt...n-evo/?lang=en shows the post and mount style.

  18. #18

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    on a sidenote, that roller looks great! my friend has a bigdog import with the 107" and it hauls ass. Im sure it will be a beast in a stripped down rigid chop

  19. #19

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    Quote Originally Posted by 1954bmw View Post
    Really surprised at you guys, evidently, he has an FLT/FXR rubber mount drivetrain. My friend started a Santee rigid frame build and had a rubber mount drivetrain from an older FLT, he chopped the seat post out of the frame and added a frame tube brace on the right side of the frame and mounts to grab the trans mount. This would allow use of his primary's, starter, etc. Would this be cheaper then transferring trans guts and other stuff???? Friend ended up with prostate cancer and I bought the roller, have over 2000 miles on it with a dresser drivetrain. Good luck
    The OP asked about a transmission to fit the frame, not how to make his frame fit his drivetrain. No surprise that his question got answered (OK, a little surprised, thread drift could have killed the answer.)

    Jim

  20. #20

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    But, wouldn't it be cheaper and easier to make the frame fit the drivetrain??? He said he doesn't want a three inch belt drive and all his Bigdogg shit would work, no looking for starters and primarys and trans??? Just a thot??

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