Basically there were only a couple of items not replaced and that was one of them. I haven't replaced it, just reduced its gap. Early days, as the fault was intermittent, but I gave her a good ride yesterday and no probs whereas the day before it was happening a lot! Fingers crossed!
As Sherlock once said "once you've replaced every f'ing component in the bastard bike, you are left with the obvious" :wink: Hope that's the end of it!