I got the chance to run my ZXR on the dyno at Ultimo TAFE on Friday. I still hadn't balanced or tuned the pilot mixtures properly since doing the top end, but I was keen to find out what was going on with the flat spot, as I haven't been able to fix it. Dyno's are a nice tool, my problem is that when cruising around at 60km/h in 5th (or 70km/h in 6th), opening the throttle results in a bog. If you then immediately repeat that, it revs cleanly. With the dyno we can replicate that, and found that it is actually a very rich spot. The AFR was down to about 9.5:1 at that point. The bike was also very lean at idle, varying between 13-15:1 Did two power pulls and ended up with 37.4HP with 2% atmospheric correction. AFR was 11.7-11.9, so a little on the rich side.