Spoke with Gavin at Race HQ today and he says he hasnt had any FZ1s or 8s asking for ECU reflashing, only R1s and R6s so far. I am not surprised as it isnt readily obvious that they provide this kind of service for our bikes. I think it needs to be advertised a lot more to generate business, which hopefully this thread will help to do. It wasnt easy to find anyone who does Yamaha FZ's ECU reflashing based in the North.
I totally agree that it is better to take the bike and have dyno runs done rather than send the ECU off for a generic "off the bike" flash, however, its all distance related for most of us. Fortunately its only a couple of hrs down the road for me to get to Race HQ, so I will hopefully get down there later this month.
As I said previously, I will keep the thread updated with progress. Cheers