Hey folks, i've got a new project to start posting work on.
I've got a triumph job in the shop. Turning a sportbike into a long distance touring bike for a customer. I'm not really one for posting up pictures of my real work in progress, but this is one little snip-it of a 'project within a project' that i think won't hurt to leak out ahead of time, and doesn't show too much of the job in progress. I just started this part of the project yesterday, and i figure i'll have it wrapped up by mid-week. I've got some 6061 tubing, and plate in the construction, and it's all tig welded.
One of the parts of this bike is that it will have a suspended bobber seat, riding on coil-over mini-shocks. The interesting setup of the seat shocks to keep a low seat profile, and the abnormal shape of the swingarm made creating all the brackets and the shapes of the supports a little more interesting than normal, so i figured i'd share.
First things first, finding the centerline of the support bracket i welded in the top of the structure to mount the shocks off of. The bottom of the shocks are actually going to hang into the negative space in the swing-arm, so that the seat height won't have to be raised way off the bike.
At first thought, i was going to try to bend pieces to make some nifty and clean little mounting tabs and weld them in... but the bends to get down into the swingarm are awkward enough and sharp enough so that a regular bend won't do it, and trying to heat bend the aluminum into place just makes the material tear and fall apart (even with annealing it before-hand).
So i have to do it the hard way, cutting out individual mounts and grinding them smooth and matching and all that mess. So, templates were made and the arms cut out of some 5/16" 6061 plate on the bandsaw.
Bolted together with bits of scrap square tube mocked in as placeholders for the shocks, they kind of look like little T-Rex arms when they're put together... and i had some fun making dinosaur noises and waving the tiny arms around for a couple of minutes before i remembered that i'm supposed to be a bike builder, and thus, too cool for that sort of thing.