I restored the XS1B's brake lever using (almost) all of the original parts. Still waiting for that critical part to come, and then I'll reveal what the rest of the bike currently looks like.
These steel parts give an idea of the condition the lever was in. One of the few parts that I didn't re-use was that threaded brass sleeve (red arrow). You can see how worn it is. That wear equals lever slop. As far as I know, that threaded sleeve is unobtainable, but I found a steel one in my Big Box O' Brake Junk.
Here are the steel parts after nickel plating. My plating has gotten MUCH better. I've completely re-done my plating set-up, and figured a lot of stuff out. I need to write an update for Jim's plating thread. Most of this stuff can be bought NOS on eBay, but what's the fun in that, and besides, the whole reason I started plating was so that I wouldn't be nickel-and-dimed and have to wait for shipping on little bits like this.
My one regret is that I didn't sand the head of this bolt (the long pivot bolt) smooth before I plated it.
For the handlebar pinch bolt I used a stainless steel bolt. I grinded the grade markings off of the head, and then wheel-polished it. This is
extremely satisfying. It takes just a few short minutes to transform an ugly bolt into a perfect little gem.
BTW, I have to apologize to 5twins on this subject. A few years ago he was showing off some stainless bolt heads that he had done the same thing to, and I made fun of him, saying that "if you're polishing bolts, you have too much time on your hands." I take that back, and thanks for a great idea. I polish all of my stainless bolt heads now in situations where they show on bikes that matter.
That washer on the bottom of the brake light switch is the only other thing that I replaced. Replaced the rusty original with this big fender washer -- it's on the bottom, where no one will see it.
Just used regular black heat shrink tubing to replace the switch sheath. Could have bought reproduction silver sheath, but that would have meant spending money, and re-doing the two bullet connectors, and besides, it looks like the cabling on this bike will be a mix of black and silver anyway.