Leading Link Designs - Post Pics

Discussion in 'Hacks' started by Pezz_gs, Feb 5, 2008.

  1. Pezz_gs

    Pezz_gs Cant ride for crap

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  2. FUTURE

    FUTURE Left right out

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    Pezz we might have known each other. Were you in the Sydney Sidecar Owners club?

    Here is my LL. Bob Martin made...

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    #22
  3. Bandit Bill

    Bandit Bill Newfie Rocketeer

    Joined:
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    Somewhere between Hamilton, Ontario and Hell
    I put the leading link front end together for my Bandit 1200 during the winter of 2004-2005. I started off with a bare 15" EZS front wheel assembly and fender imported from the UK and Charnwood Restorations.

    Keep in mind, i had minimal power tools/equipment to do the job - a hacksaw, hole-saws, drill-press, hand-drill, lots of files, and a bench and hand-grinder were about it. Surprisingly little was farmed out to a machine shop to complete. I'm a social worker, not a machinist, but i had a whole winter to do my research and do the project correctly - essential with such a safety related component to do right the first time.

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    My design was going to incorporate floating calipers. These brackets were cut by hacksaw, and finished with lots of hand-filing. These as pictured were at about the 50% stage.

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    The start of the swingarm. The axle bosses are machined billet roundstock, and slipped into the ID of the pipe. The pipe used on the project was .188 wall 1-3/4" DOM tubing. due to the size of this tubing, i elected to build a 3 piece swingarm fork, welded up. Why? It suited the design to come, of the adjustable bearing block shoes mounted to the swingarm for the downtubes. The tubing is in a homebrew welding table to keep things lined up and square during welding.

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    The wheel assembly/swingarm of the leading link coming together. The brake calipers are fully floating at this stage. The adjustable bearing block shoes for the leading link downtube pivot point have been machined also. The 6 pot Tokico calipers were way overkill for the front end, and weren't used in the final setup - i elected to use my 4 pot Nissin calipers in the final build.

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    The next steps of fabrication moved rapidly. The 1-3/4" (44.5 mm) DOM tubing was lathed down to 43mm at one end of each, to slip through the bandits stock front fork trees. The downtubes were then cut, bent to desired angle, and welded with substantial gussetting at stress and vibration points. brackets were welded to the end of the downtubes to mate with the bearing block shoes on the swingarm. Tubework was fun.

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    The completed front end back from the powder coaters, and fully installed on the Bandit.

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    Some have commented that my front end has an industrial, somewhat overbuilt appearance - I live by the motto of "when in doubt, build it stout".. I had a whole lot of doubts in entering this project, so it was overbuilt to the point that any doubts about it's strengths were removed from my mind.
    #23
  4. Pezz_gs

    Pezz_gs Cant ride for crap

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    Here is a pic of my old Z1300 I built in 1994. !983 Carby Model with a HRD Grand Rally Double. The links were made by Terry Gunter in Wollongong. Talk about Transforming the bike. 100mph 1 hand on the bars. sweet!

    View attachment 150795
    #24
  5. tripodtiger

    tripodtiger Off riding around on bitumen circles.

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    you dont call wagga wagga wagga
    G'day Pezz.
    I saw a set on a BM on the road out from the TTT one year. Snapped off at the lower triple clamp. They were made by some bloke in the 'gong who 'knew what he was doing'.:huh:eek1 Wrote off the BM engine. The rider nearly got skittled by the front end flapping around beside the bike as it ground the sump off coming to a stop:eek1:eek1:eek1
    The legs had been turned down from some sort of pipe so that they would fit into the triple clamps:eek1:eek1:eek1:eek1:eek1:eek1:eek1:eek1 and :eek1

    If you like, I could quiz Leigh Hollamby about materials, or you might find his adv in a mid '07 copy of Aust Road Rider. Not that you'll be having a set made but, he's not taking on too many outfit jobs any more - got other things to do.

    And for those others that would like to see his handy work.
    The DRz400.
    My Triumph Tiger
    and these trailers...sorry, I'm still not certain how to link directly to my smugmug account, so this may just be a link, ranther than the photo.
    http://SCRay.smugmug.com/photos/251837822-L.jpg
    #25
  6. tripodtiger

    tripodtiger Off riding around on bitumen circles.

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    #26
  7. claude

    claude Sidecar Jockey

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    #27
  8. atgreg

    atgreg Africatwinarama Super Moderator

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    Like this,

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    #28
  9. Pezz_gs

    Pezz_gs Cant ride for crap

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    I pretty sure its not the same guy. I would hate to lose the Z1300 links at 160kph :eek1
    #29
  10. Pezz_gs

    Pezz_gs Cant ride for crap

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    How much Travel does everyone have on their Leading Link Suspension ?

    I have been looking at the Ikon (koni) shock specs and working backwards to establish swingarm length.

    Probably going to look at 200mm (8") as a starting point :ear
    #30
  11. Bandit Bill

    Bandit Bill Newfie Rocketeer

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    Darn Little.

    I'm using Progressive Suspension 418's, meant for the Harley Big Twins. I ordered them along with an alternate spring set - the stock springs were too weak as is. It's been several years now since i did the ordering but iirc the stock were rated at 140 something or other - the new springs were 210 something or other. It actually took a full year to "break" the springs in to to get them responsive and less harsh in terms of ride. Mine are the 11.5" models. I bought them because of the offset eye mounts. Total travel is in the order of 1 1/2" useable. They are effective, i haven't lost any teeth fillings lately...

    FWIW..
    #31
  12. HogWild

    HogWild Scott Whitney

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    SoCal USA
    8" of travel is huge for a street or dual sport rig. My off-road rig is just over that, and we do some pretty nasty rough stuff.
    #32
  13. creeper

    creeper Still alive...

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    Anyone remeber the Valentino Ribi designed "quadrilateral"?

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    C
    #33
  14. Schtum

    Schtum Free Genie

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    Howe of Fife, Scotland.
    I took these pics in Whitefish, Montana in June last year. Apart from the fact that it's a K1200LT, I know nothing about the rig. Perhaps someone could enlighten me...?

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    #34
  15. Pezz_gs

    Pezz_gs Cant ride for crap

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    Hi Creeper :wave

    Yep, Now that is art. I have an article on that in an old Vintage Offroad Magazine.

    If you would like to modify it and design it for my sidecar I will get it machines :evil

    Great to hear from you again.
    #35
  16. creeper

    creeper Still alive...

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    Hey brother... :wave

    Ha ha ha... You'd be spending all your time greasing joints.

    There's a less complicated version, made of chromoly by Bruce Burness, on Roger DeCoster's '79 Suzuki GP bike... in the Feb '08 issue of Motocross Action Mag.
    Ohlins side mounted shocks instead of the Rube Goldberg linkage seen on the Honda... way less busy, and looks to be far more adaptable and build-able.
    Here's a scan of that page photo... click the photo for a larger version.

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    Then there's the AMP Research fork... which you can find a less than detailed patient drawing of here from '95.

    You take care... have fun with this little project.
    C
    #36
  17. Sparke

    Sparke Been here awhile

    Joined:
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    Sparks, Maryland,USA
    Those dirt bike got me thinking "GREEVES"....but when I goggled GREEVES I also found this.
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    #37
  18. HogWild

    HogWild Scott Whitney

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    Then there's the Trailing Link, seen here on one of the original Wasp rigs:
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    And another variation ...
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    #38
  19. claude

    claude Sidecar Jockey

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    Speaking of Trailing Link front ends see pic below:eek1
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    #39
  20. RedMenace

    RedMenace Adventure Sidecar

    Joined:
    Dec 22, 2001
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    GoodLiver,Oregon,USA
    Great thread! Any comments regarding the pros or cons of leading vs. trailing link front ends?
    #40