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1984 Honda Shadow Vt700c Cafe Racer

This is a discussion on 1984 Honda Shadow Vt700c Cafe Racer within the Project Builds forums, part of the Caferacer.net Forums category; Originally Posted by Sabre Cafe You just might be able to adapt a Honda Sabre swing arm to that frame. That way you'll get all ...

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Thread: 1984 Honda Shadow Vt700c Cafe Racer

  1. #11
    Member Star Lord's Avatar
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    Quote Originally Posted by Sabre Cafe View Post
    You just might be able to adapt a Honda Sabre swing arm to that frame. That way you'll get all the links you'll need to install a mono shock. I have a Sabre that I did a few mods on. The shitty air shock was swapped out for a CBR 600 mono shock. Here's the video where I modified and mounted the shock. Fast forward to 10:45 to get the part about the shock.


    As I say, this swing arm "might" work on your frame.
    Are those your videos?
    Im subscribed to your channel on youtube I watched the whole build of your bike great work dude lol, I cant believe I never noticed your swing arm was a shaft drive!

    I will look into it immediately!
    Do you possibly have the measurement of the length, of the part, of the swing arm that goes in between the frame???
    Delson Da Silva,
    Mechanical Engineering, BS 2019
    Boston, Massachusetts
    My projects: www.projects.djd.im | [email protected]

  2. #12
    Member Star Lord's Avatar
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    Has anyone here ever tryed to fit a 1985 Honda saber swingarm into a 1984 honda shadow frame?
    (give or take a couple years on the models?)
    Delson Da Silva,
    Mechanical Engineering, BS 2019
    Boston, Massachusetts
    My projects: www.projects.djd.im | [email protected]

  3. #13
    Senior Member hillsy's Avatar
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    Quote Originally Posted by Star Lord View Post
    Has anyone here ever tryed to fit a 1985 Honda saber swingarm into a 1984 honda shadow frame?
    (give or take a couple years on the models?)

    Where's witworth when you need him?



    Actually, scrap that idea....
    RetroRider likes this.

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  5. #14
    Senior Member Sabre Cafe's Avatar
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    I have a 84 Shadow 500 here at the shop that I can measure, and I'll measure my Sabre later today and post the specs here for you.

    UPDATE: After looking at the Shadow I have here, no way will the Sabre swing arm go on there. The drive shaft attaches in a different way and the swing arm just won't fit.
    Last edited by Sabre Cafe; 09-04-2014 at 06:55 AM.

  6. #15
    Member Star Lord's Avatar
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    I had a feeling it wouldn't line up or fit :/ but thats ok I think I might order a spare (84 shadow) swingarm and weld the brace Im designing right onto this swingarm and test it to see how it plays out.

    Im going to design the brace, model is on solid works run some simulations and get a second opinion from you guys.

    I keep this post updated, thank you everyone for your help.
    Last edited by Star Lord; 09-11-2014 at 04:30 AM.
    Delson Da Silva,
    Mechanical Engineering, BS 2019
    Boston, Massachusetts
    My projects: www.projects.djd.im | [email protected]

  7. #16
    Senior Member Geeto67's Avatar
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    some of the guys on here are ME's. I know jag is one and I think TCED is one also.
    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
    - Samuel Beckett
    A tool is just an opportunity with a handle
    - Kevin Kelly

  8. #17
    Senior Member raven's Avatar
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    How I would do it. If i HAD to have a monoshock. Look at the xr70 monoshock swing arm. Make a piece that attaches to the stock twin shock mounts that mimics that setup. You will need a front brace going down to the pivot area. Possibly some tabs there, and the whole thing could be unbolted.
    Bike:
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    My collar may be a little frayed, and maybe I need a shoeshine. But nobody\'s got a mortgage on my soul. I own it. Free and clear. -Phil Lovecraft

  9. #18
    Member Star Lord's Avatar
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    Alright I disappeared because classes started up again and I have been a bit busy anyways....
    I mocked up a rough idea of the swingarm brace I had in mind, I made this with the goal of evenly distributing the stress of the suspension through out the swing arm.

    This drawing is 2D but the idea is that the farthest reaching bar of the brace loops around the wheel to the other side of the swingarm, while the vertical supports absorb the stress and disperse evenly over the swingarm.

    Name:  Brace 5 bolted.jpg
Views: 21201
Size:  1.01 MB
    the swingarm could be tabbed to bolt the brace in place (for easy removal in the future)

    or

    Name:  Brace 5 welded .jpg
Views: 4572
Size:  1.01 MB
    It could be welded along on to the swingarm.

    Can anyone comment critique it and give suggestions?
    The more I looked at it, the more I felt like the shock should be mounted more horizontally (not completely horizontal), since the weight will be coming from mostly the front (the engine mostly) as apposed to from above.

    Maybe I should angle the shock to the loop bar around the wheel so I can channel the stress straight through the shock to the brace?

    I'm not sure though....
    Delson Da Silva,
    Mechanical Engineering, BS 2019
    Boston, Massachusetts
    My projects: www.projects.djd.im | [email protected]

  10. #19
    Senior Member parkwood60's Avatar
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    No, that's pretty much exactly right. I can't find it right now, but try to find pictures of the early BMW R90S AMA superbike race bike. They basically did exactly the design you drew. You really don't need that many braces, typically you see one or two tubes from the diagonal down to the pivot where the shock mounts, and another one on each side from the diagonal to the leg of the swingarm, at 90 degrees.

  11. #20
    Banned Witworth's Avatar
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    On your rear shock bolt mount position, it needs to be far higher for correct and safe suspension geometry. The rear shock bolt can't go "under centre" at full squat, if that makes any sense to you.

    You should plan on two alternative shock mounting points on the frame or the swingarm to enable chancing the ride height. The front shock bolt mount needs to be very strong and braced. I doubt the Shadow frame is very strong there at all.

    The swingarm would have to be bolted into a stable jig if you wanted to weld stuff on.

    The brace you have drawn need to be braced transversely with strength, not just in the direction of suspension stresses.

    Danger, is my business.

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