There's a bit of art in turning perfect threads on a lathe. I still enjoy reading old machine shop books that tell how to grind the tool, set the point and compound and so on. I'm at a disadvantage cutting metric threads on the big lathe as it is missing those gears. If I wasn't electronically chall...

The brakes are finished so I disassembled the motor. Starting with the head, 2 of the valve shim bucket were stuck in the head. Several hours of soaking with Kroil, heating and cooling and they finally cam out without damaging the head. The surface of the head was heavily pitted and after attempts o...

If you aren't over a hear behind that's a good sign I have stopped counting projects, now just counting years...left.

Looks nice. Who did the powder coating?

The sleeve is aluminum 2024-T3. 6061-T6 would have been ok too. I bored and reamed the piston and then turned the od of the tubing to fit using loctite. I finished of the bore off with a 5/8 reamer.

Holidays are over and time to get back on this project. More disassembly indicated more problems. I started with the brakes since corrosion and brake fluid was evident where it shouldn't be. The early Z1Rs had a cable operated front master cylinder with a 5/8 piston. Rebuild kits are available but n...