Thanks for that info, Kev. I was very interested to read about your fuel results. I've long thought that various engines run better on particular fuels. I tried 98 in my Tenere, and thought it felt woolly, so I went back to 95.
My TTR250 runs like a bag of p** on 98, better on 95, and best on 91. Seat of the dacks, of course, imo and all that.
My '96 model Tenere was noticeably slower running 95 rather than 91. Odd, but it you have made my thoughts reasonable.
Good work, mate.