I finally have all the necessary parts and pieces, with the exception of some bits I will have to make or scrounge up from some old beachcomber who is hoping to retire by hawking the miscellaneous motorcycle parts he has collected over the years to some unsuspecting addict…

The machine shop reamed the guides and cut the valve seats. I de-glazed the cylinders and installed new rings on still stock pistons. An initial adjustment of the tappets and now it’s on to the Amal dual concentrics and a bit of tidying up the Oil Bath.

The original valve springs with a substantial amount of metal fatigue are the shorter set. Even the material of the new springs is of a much greater quality than was available forty-eight years ago.

Out with the old, in with the new.

Pistons protruding above the cylinder at TDC. Compression equals horsepower.

1966 Norton Atlas.
Drive side.

1966 Norton Atlas.
Timing side.