With a few months of riding under my belt on my 06 YZ450F I can confirm that no, it really doesn't turn well. I think I've knocked enough rust off that my skills should allow me to hold a line in a turn but it's still a struggle. I ride mainly in sand but there are some areas with dirt as well. I've replaced the handlebars with a Windham bend set, moved the forks up and down, currently 2mm up from flush, and experimented with tire pressure. I can actually feel the difference, however slight, in the changes I've made but ultimately it still steers poorly. In fact I rode my buddies newly purchased 07 YZ250 last night with a bad suspension setup and it turns better.
I'm at the point with it now that I really don't want to sink too much more money into it but if I can find a different set of triple clamps to try for cheap I would give it a shot. I was reading that the 10-13 YZ450 clamps have a 22mm offset but that the upper clamp will not fit on the 06 forks, is this correct? Does anyone know of another set of stock clamps that would fit the bike properly? I really don't want to spend 400-500 dollars to find out it still won't corner well.
If there is no real cheap solution I may have to look at what I can do with the forks themselves but any mods there likely won't be that cheap either.