The GO-SPORT adventure!

Discussion in 'Some Assembly Required' started by tobiism, May 26, 2016.

  1. tobiism

    tobiism Been here awhile

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    Rolled it out for a look-see
    20190526_223027.jpg

    Daaaaaang. As much as I like the sporty tank, a fat, bulbous 5-gallon desert tank is in the works. The tanks will get switched out when the Supermoto wheels go on. Oh yes Supermoto wheels are in the works as well.
    Oh and that's 13 and a half inches of ground clearance at the frame rails!
    #81
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  2. madrider5150

    madrider5150 Riding somewhere

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    Rekluse and sumo wheels? I like where this is going.. I looked into the rekluse, its a pricey item and couldnt find too many reviews on it either, at least for the sportster.
    #82
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  3. tobiism

    tobiism Been here awhile

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    In talking with Bill from biltwell they ran one on the frijole race bike they built. Said it was a lifesaver
    #83
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  4. tobiism

    tobiism Been here awhile

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    Headlight and oil cooler setup now all mocked Up
    20190527_171847.jpg 20190527_171854.jpg 20190527_171859.jpg
    #84
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  5. Webman

    Webman Been here awhile

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    #85
  6. jays100

    jays100 Been here awhile

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    Newly joining your build thread. One thing i've always wondered is what the all-up weight on these sporty builds end up being?
    Am intrigued with the sporty engine, etc. but the builds mostly seem to use the stock frame (well, JTH mods his), which is horribly heavy. But you built your own so if the running gear/rolling chassis, less engine, ends up being in the 150lbs and the Sporty engine is in the neighborhood of 200lbs....is that correct? An adventure sporty 1200 can be 350lbs? not believing it so what's the weight of yours?
    J
    #86
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  7. villageidiot

    villageidiot Long timer Supporter

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    I was talking with @AK650 and Richard pollack (AKA mule motorcycles) and he said he got a sportster down to 315lbs, but it was a LOT of work, titanium etc etc.
    #87
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  8. tobiism

    tobiism Been here awhile

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    This one's going to be in the neighborhood of 450 lbs.
    I will weigh it once it's done and filled with fluid
    #88
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  9. tobiism

    tobiism Been here awhile

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    Without the detachable bag setup I built this bike to 416 lbs wet.
    Handled like a dragonfly
    DSCN0281.jpg
    DSCN0286.jpg
    #89
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  10. AK650

    AK650 Long timer Supporter

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    Really cool project! Thanks for the heads up VI !
    #90
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  11. AK650

    AK650 Long timer Supporter

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    I'll be happy if my project ends up at 415lbs! :D Getting to 315 would be way more work and $$$$ than I'm willing to muster! But, it is cool to know it can be done.
    #91
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  12. tobiism

    tobiism Been here awhile

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    Yeah everything I do is pretty much on a shoestring budget. I didn't have the cash for Exotics to get the Monoshock project lower than 415
    At that point you are talkin about thin wall chromoly tubing chassis, titanium everything, race brakes, magnesium Wheels, Etc
    #92
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  13. greasyfatman

    greasyfatman Long timer

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    Efm makes an auto clutch too. Think he started with Harley then made some for other bikes. Easy guy to work with. Easiest auto to install. I have three different manufacturers auto clutches, he did mine for the kdx.
    #93
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  14. JagLite

    JagLite Long timer Supporter

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    I really like your build... but...



    :hide






    [​IMG]


    Your swing arm looks so flimsy :yikes

    Is the axle plate really only welded on only about 3/4"?
    Is the arm double wall full length?
    You could easily measure the twist strength by clamping the swing arm pivot bolt in a fixture to hold it from moving and then put a dial indicator at the axle plate of one arm and see how many pounds force it takes to twist using a jack, or even just a crow bar or length of pipe.
    The compare the deflection number and force applied with other good swingarms.
    I think you will find out it is very weak compared even with a stock Sportser arm.

    You could also test the point loading of the shock location by fixing both axle plates and the pivot point so they cant move and measuring with a dial indicator how much deflection at what force. Ideally you would test to destruction to see how it fails, bending or cracking, but I doubt you want to do that.

    The Carducci Dual Sportster has a good example of a swing arm designed for the loads.

    [​IMG]

    I'm not a fan of the billet design though, it is very expensive to produce, difficult to clean, and offers minor weight savings over rectangular tube.


    Round tube is really not the best for the bike weight and your shock location, unless you add bracing, something like this:

    [​IMG]

    [​IMG]

    That would spread the load from your shock location and dramatically increase the "twist" strength of the swingarm.
    (placing the diagonal brace top location below your mid arm shock mounts)

    Or you could build a proper rectangular swingarm designed for your shock location and length, what was called a banana swingarm in the late 70's.

    Some examples:

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    Aluminum would be excellent but is much more expensive and difficult to weld than steel.

    Take a look at THIS SITE for swing arm design and fabrication for more info.


    Carry on brother, I'm just seeing a very likely problem area for your bike. :fpalm
    #94
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  15. tobiism

    tobiism Been here awhile

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    Haha no worries! That swinger is STOUT. Its 3/8" thick wall 1.25" chromoly with the .120" thick wall 1.5" outer sleeve. I'm going to run it but I'm also not planning on treating it like a race bike.


    #95
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  16. JagLite

    JagLite Long timer Supporter

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    :ricky
    #96
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  17. villageidiot

    villageidiot Long timer Supporter

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    Maybe just a bottom/top plate to box in the drop out.
    #97
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  18. tobiism

    tobiism Been here awhile

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    Thats not a bad idea
    #98
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  19. Helibee

    Helibee Been here awhile Supporter

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    Do you happen to remember which Mule build was/is 315#?
    #99
  20. villageidiot

    villageidiot Long timer Supporter

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    No, he has said he did a sportster and the goal was 300lbs, he got to 315 and called it good.
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