Just some extra feedback from the test, while to video is being readied.
Here is a still from the video - this was a section where we filmed from a car while the bike drove on a bumpy section of the apron. This was to watch the suspension action, so that I could evaluate how well it functioned.
After checking the machine over after the test, I found a fault which explains the dissappointing performance. The fabricated inlet port runner (which I expected problems with) had fractured, causing a severe air leak. This undoubtedly affected the power output and throttle response, so I'm not so shocked about the poor performance, in hindsight.
I think a retest is in order, so I'll fix the faults and finish the jobs that are in the pipeline, then go again. The video should be finished in a week or so, and that will be my next post.