Take a look at the PC3 maps from Ivan, Duke, etc. regardless of mods they are within several points of trim of one another. In other words aside from an exhaust, mods don't effect the required tirm a great deal once you are in the neighborhood. The main thing a tune is doing is correcting the fueling from the factory and aiming it towards a given target; AFR, CO%, etc.
As far as experience with the FZ1, it's just another Japanese inline 4, nothing rare or unique about it. Much of what they offer is going in a changing lines of code that neuter the bike, that is pretty easy, once you are in the ECU. Also note that on the list of things they can change, idle speed, engine brake, etc. Those are rider selected options, no need for a dyno to change those things.
Being that they only offer tunes for specific bikes that implies they have worked with that bike. DynoJet, Bazzaz, etc is the same way, they only offer product they've worked with.
Regardless I'm looking forward to seeing how this turns out, it's great that we can finally get inside of a Yamaha ECU. I love doing stuff like this. :tup: