Thanks CaptMoto, I shall have a little play when not at work. I'll first set the CO to +10 the current setting and take it for a ride and then if not improved -10 the original setting.

The bike never cut out on idling, and like I said when idling I cannot really hear any "surging". We can just feel it when riding. I must say that when I enabled the RPM counter the bike's idling was a little low when warm, about 1250rpm..

I just did not think this was classed as surging cause surging in my electronic background means more as in more power and not a slight dip in power. But I am still green on the bike front so learning a lot..

I'll post an update on the outcome.