Wear and swear

THERE’S A COUPLE of photos here of a camshaft, the four lobe jobbie from a Norton Commando.

Note the, er, unusual wear on two of those lobes. They’re chewed flat except for the bits still flying the flag where they’ve missed the follower.

In all my years playing with motors, I’ve never seen wear as extreme or as focused as this. It’s as if someone shot a nail through the barrels and