Thanks for your quick replyes.
My timingbelt is about 4000km old, and it is close to the 6mm limit, so I will replace it.
Checked the timing just now, and it is timed correct
Awaiting warmer weather, to see if the new timingbelt will cure it.
Hi, I am new to this forum. I have had my Dart for a few years, and it has this very same flat spot from the very beginning. Have you found the cause for this flat spot? Mine has had the same cure as Paul suggested, to improve breathing. I use 115 jets and the rest is unchanged. I have build my own ...