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Discussion in 'Hacks' started by Pezz_gs, Feb 5, 2008.
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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...
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.
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.
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.
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.
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.
The completed front end back from the powder coaters, and fully installed on the Bandit.
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.
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!
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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.
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.
OT -Am I doing something wrong here??? Gimme a break, I'm a middle aged Learner!
Those links that Bob Martin built - there is certainly no style to them, eh?
I pretty sure its not the same guy. I would hate to lose the Z1300 links at 160kph :eek1
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
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...
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.
Anyone remeber the Valentino Ribi designed "quadrilateral"?
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...?
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
Great to hear from you again.
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.
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.
Those dirt bike got me thinking "GREEVES"....but when I goggled GREEVES I also found this.
Then there's the Trailing Link, seen here on one of the original Wasp rigs:
And another variation ...
Speaking of Trailing Link front ends see pic below:eek1
Great thread! Any comments regarding the pros or cons of leading vs. trailing link front ends?