Yesterday I made another twin lobe points cam. The original I made worked fine, but was slightly out, so I did a little more filing, too much ask it turned out, a few swipes with a file took it past the midway point on the backing plate adjustment.. I've made a few of these points cam, very difficult to get accurate, one swipe of the file can ruin a hole days work. But this one I got spot on for both cylinders. Today, I made a clamp to hold a bit of felt to lube the cam, very small exacting work. After all that I polished the cam and backing plate, just because something isn't seen doesn'mean it shouldn't be shiny. I once polished the rocker arms on a Bonny.
