The crank needs to go forward slightly. Take the screws out of the front housing in case the crank is tight on the front bearing. Turn the engine to TDC. Tap carefully on the rear end of the crank and it should go forward enough to free the crank pin from the rod.

You might consider freeing the cylinder and removing it first. Turn the engine to BDC and insert a piece of wood in the exhaust port. Turning the engine towards TDC should free the cylinder. Don’t bend anything.

Bill

Don’t pay any attention to me. I put one together backwards this morning.