Err subframe and a tiny bike ...now a 1400

Discussion in 'Hacks' started by WILL_S, Jan 31, 2019.

  1. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Comparison
    djp fibreglass body with alloy tub overlaid .

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    #81
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  2. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Nearly where it all needs to be .
    Just got to make it jump out of the computer and into reality

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    Shock of gsxr1000 for the chair

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    #82
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  3. steam powered

    steam powered just a regular punk

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    Will, if I could make a small suggestion it would be to change the angle bracing in the chassis to go from the suspension pick up directly to the lower mounts. That would create a direct load path to keep the sidecar suspension rigid in space relative to the bike. The suspension pick up on the sidecar, the swingarm mount on the bike and the steering headstock on the bike is where the dynamic loads are fed into the chassis. Keeping these rigid in space is the basis for good handling.
    If you think of a modern aluminium sport bike frame, the bulk of the chassis is about keeping the steering head rigid to the swingarm pivot with much smaller framing to support the static loads like the rider and passenger.

    Looking good though
    #83
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  4. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Thanks for the info , makes sense .
    Posted this build to hopefully learn a thing or 2 as I go . Plenty of knowledge in hacks to steer you along .

    Picked up a fridge ...they reckon it holds 18 cans :drink . Compact compressor fridge should be a luxury . It's small enough to fit between chair and bike or in the boot. Colour matched too .

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    #84
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  5. cycleman2

    cycleman2 Long timer

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    Looks great. Enjoying the build.
    #85
  6. 3legs

    3legs Real men ride sidecars Supporter

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    I've used 3mm ali on all of my outfit bodies.

    Holds up really well in Aussie conditions and you can bolt things directly to it.

    Not much heavier than fibreglass although it is more expensive especially getting it Tig welded but it will still be around long after Covid -19 gets us all :lol3

    I prefer flat uncurved surfaces mainly for ease of construction and it's easier to bolt things to flat sections plus it gives you maximum storage space.

    This is my latest outfit. All ali.

    Also you said 75mm max trail. Do you mean steering trail, if so I've never heard that before. Very odd that regs would require something that dictates your trail.

    BTW I remember seeing your sidecar at the Mad Max 40th anniversary in 2019 with the machine gun mounted on the nose :D Got a photo of it somewhere.

    [​IMG]
    #86
  7. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Nice chair . I think i have read most of your builds ,heaps of good info and pics . Pics help a simple bloke like myself.
    That post about trail should of said min 75 (qld regs)

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    Dave owned the mad max setup . I brought the chair off him and he has picked up another mad max themed djp in great condition . He has/had a great collection of sidecars .


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    #87
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  8. 3legs

    3legs Real men ride sidecars Supporter

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    Wow that is interesting about the trail however it doesn't mention leading links just offset triple clamps. I wonder it the same measurement applies to links? Would be interesting to see what happens trying to get it through rego.

    Yep that's the outfit. Here's the pic I took.

    [​IMG]
    #88
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  9. WILL_S

    WILL_S OUTLAW POSTIE 001

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    So i sit back and chug down a couple of Guinness. Drjoe waves his technology wand , perhaps eloquently sips on a scotch ,and we have a re tweaked chassis.
    Getting closer to jumping out of the virtual world

    Option 1 ,2 or 3 ?
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    #89
  10. DRjoe

    DRjoe Long timer

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    Hey you forgot to put up forth a final option.
    #90
  11. brstar

    brstar Long timer

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    They all seem a bit fussy to me.
    Not sure you wanted to read that but to my mind if you up the perimeter frame to larger diameter tube especially if you can lay you hands on some DOM tube say 50mm then all that is needed is a central tube to the swingarm .
    KISS.
    2C worth.
    #91
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  12. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Opt4
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    These are the kiss ones :lol3
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  13. steam powered

    steam powered just a regular punk

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    4.
    #93
  14. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Simplified chassis .
    Getting close .
    IMG_7231.jpg
    #94
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  15. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Metal artist ,cad master ,sidecar designer convert at work .
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    Labor day in QLD and my superchump press decided to take a union stance , didn't like bending 8mm plate . Looks like it will get some mods .

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    Work on the subframe is coming along . Aluminium rough template for front top mounting and then stitching together tube, flat ,rhs ....

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    #95
  16. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Slow going.
    More work on the rear attachment points .
    Pretty happy were they are at just got to weld on clevis /tabs and drill speed holes and the back section is done.

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    Handbrake lever turned up and Joe has got in a mini caliper.... let's see if these two play nice together and hold err up.

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    #96
  17. 3legs

    3legs Real men ride sidecars Supporter

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    You could also use your sidestand bracket as an extra mounting point just for the added piece of mind.
    #97
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  18. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Cheers :beer...the good green beer

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    Onto it

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    Tapped plate and a bush and it's solid
    :strum
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    Working forward I got options .
    Headstock brace has 4 holes I can mount flat plate to or I can run a clamp off the frame tube .
    Will be running the subframe tubing up for the front top mount . Just working out if I brace across to headstock gusset or frame .
    #98
  19. 3legs

    3legs Real men ride sidecars Supporter

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    Haven't seen a Darwin stubby in a while
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  20. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Might be a good idea not to drink this one.
    The old boy got it years ago then gave up drinking in his 70's and it got flicked to me .

    Update on the slowest subframe build :
    Looks like each weekend is one more piece added . No time during the week as to unlike most during this err pandemic my work load doubled .
    Cutting ,shaping ,tapping ,bending and welding gets the front section tacked up.
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    If you have read most of the Aussie built threads you will recognise the various attachment methods stolen from our greatest builders and frankensteined together to make what I hope will hang together for my purpose.
    Starting putting stuff down and losing it.
    Time to clean up before the next bit is added.
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    Attached Files:

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