OK so finally been able to machine the ports into this giant cylinder liner, so here’s the latest update.



next step is to finish lap the cylinder and make it ready to take a piston and contra. At 32mm bore that’s going to be an interesting task.
Here’s a quick look at the cylinder test fitted into the rest of the crankcase assembly.


After lapping the cylinder I’ll start on machining up the components for the compound piston assembly.
Until next time,
Dean Clarke