Ahhhhhhhhh. Machining and fabricating sweet parts is nice but doing it for your own bike on a nice sunny day just seems to be that much better. Something about the sun, sky, and the self determination of being on your own that makes the air taste a bit sweeter. Or maybe its just some new type of pollution.
The upper control arm is going to be a 2 step type of part. Because it is the main adjustment point for fast turning/front weighted bike to stable/rearward weight bias I needed to be able to quickly make and test changes while keeping a rigid part that will not introduce any vagueness into the system. The solution I came up with is a tongue-in-groove sliding joint with a screw adjustment to keep the setting under heavy load.
Now, on to machining........
This is a process we've all seen before: billet, vice machining, flip, subplate machining, then repeat. The suspense is gone but the cool pics are all new.
Here's the pile of billet that will soon become two complete control arms: