Just a thought regarding comparison between the cbr600f and the Fazer. The cbr centre of gravity is a lot lower, even at that age. Also the difference between a 110 and a 120 tyre is phenomenal. I went from a R7 to the Fazer 6 and I felt the same as you do. The skinny tyre and relatively high centre of gravity always made the Fazer seem unstable. But now I'm used to it, I find it easy to live with and nicely responsive. I'm only a little fella so the quick initial 'drop' in of the Fazer makes riding this a lot less effort. That's why I stopped buying R1's, Blades, Gixer1000's etc. They're just not as easy or enjoyable to ride. (I'm 10.5 stone in leathers!) Long story short, if everything on the bike is OK, then maybe you need to have a bit of faith and get used to it. Every bike feels different. They all have they're own character.