Hello Phil, I had something similar on a different vehicle, the loss of firing was particularly noticeable when accellerating. We discovered that the insulation on the ignition leads as broken internally when my mate got a zap from the lead while fiddling around with the throttle. New leads and all fixed. But the old leads looked ok on inspection. Just a thought....good luck! Oh, and while I am at it, do you know if anyone in Australia has had your Centa upgrade?
