Fully synthetic or part synthetic?

[PaulSmith]

I've had no particular reason to differ from the manufacturers recommend semi synthetic. 

Good for you, but the original owner of the bike in question would have had to change oil every 278 miles or less (18 changes in nine years) to met those recommendations. I did not 'justify' skipping changes, I offered advice that might be useful to those not in a position to follow the official recommendations.
You on the other hand would appear to be saying that if you follow the rules, you can avoid having to think. For your information, I check the quality and condition of my oil roughly every 1000 miles, and while I have never had a problem on the Fazer, these tests have detected gasket and piston ring failures in other engines early enough to save me a shit load of cash.

...Out of interest I checked what oil the rider of the 200k Gen1 used ...

Good. I didn't imagine it, though it was Slaninar who mentioned the track day.