Thanks for reply and welcome back

You are right the problem seem to be one of the smaller circuits within the CPU itself.The problem being the petrol is not being injected at time of spark(all injectors fine) and hence when firing valves are open causing kick back on engine sprag
Thanks for info re replacement but over 1000 euros for one




At the moment Im saving for seven days Isle of Man TT in June



Ill keep you informed of how I get on...
Timbo
