The Mad Lab

Working safely (eye protection, filter mask, gloves, and vacuum to suck up particulates), you see my surroundings.

Another Lab Shot

Beaky Little Thing

A shot of a harmless, un-suspecting head pocket, with beak still attached.

Carbide Bit

For the rough work, the tool of choice: A cheap carbide bit bought from a flea market, in a Dremel with a flex-shaft...

Labours Fruits

One of the combustion chambers with the beak ground off, and some slight modifications to the exhaust valve guide seat area.

Exhaust Ledge- Casting Defect

A little ledge that no doubt impedes flow of exhaust gases, and will have to be eliminated...

Sharp Edge

There is a slight lip under the area marked in yellow. It's a sharp lip, and I smoothed that off for better flow. Air will flow better past a radius than a sharp corner.

I Think I'm Done

I've knocked the beaks down flat, and used a stone to smooth over the gouges. Here's an example of the chamber.

Finished?

This is how the finish of the chambers looks. I'll no doubt have to grind out a bit more, and smooth off the finish, but I'm pretty happy with the results a couple of hours' work gave me!