I'm starting to wonder if I'll ever complete one.
In any case, the engine misfire thing is in another thread.
I had decided by the time I was heading down Dyers Pass Road into the crater that I couldn't trust the engine to run sweetly all the way to Akaroa and back, so I ducked left at the bottom of the hill, to come back through the tunnel. I didn't like the idea of having to ride up hill if the engine dropped a cylinder again.
When I got to the Lyttleton tunnel, I had the best engine-audio time of my life! I enjoyed it so much I ran back to Lyttleton again, and then back to Christchurch once more. I know my bike is loud; with the Zorsts fully opened up, but that was ridiculous!

The sound was shattering, right up and down the entire length of the tunnel. Drivers were tooting their horns and flashing their lights at me.

Those three runs up and down the tunnel have completely paid me back every cent I have spent on that bike, and most likely every cent I ever will spend on it. I think I'm gonna go and do it at least twice again today. I really wish I had some way to record it for you, without the sound of the wind noise.