That is correct, stock 1299 is 24 degree rake and -4mm swingarm pivot. If your bike is unstable mid-turn, that usually means it's riding a little low in the front/high in the rear at that point. But why it's in that condition mid-turn can be due to multiple possibilities. One is that the rear is just too high, and if that's the case it can be because the ride height it too high, or because the shock is not compressing enough, which can be due to either too stiff of a spring, too much preload, or too much compression damping. How do you know which? You have to check static measurements and also look at how the bike is behaving at other points in the turn and deduce your way back to what is most likely the cause. You generally won't be successful at making static changes to the bike's geometry in the pits targeted at fixing one dynamic behavior while riding, without considering all of the other dynamic behaviors. So for example, if you think your bike is falling in mid-turn and it might be because your ride height is too high in the rear, and you lower the rear to compensate, what effect does that have on all of the other behaviors of the bike, particularly on acceleration? Changing the ride height will have a small effect on steering and a big effect on rear end squat during acceleration. So the questions to start asking first are: What is the bike doing on corner exit, is it squatting enough and getting a good bite on the rear tire? And what about on the straights? When you're above 120mph is the bike rock-solid stable or does the front feel too touchy and/or wants to head-shake? If it's unstable all the time, then you can be pretty sure that the static geometry is too high in the rear and/or low in the front. But if it feels good on acceleration and on the straights, then your preferred solution is not likely to be rear ride height. And that's assuming that your static measurements, given spring rates and damping settings are all reasonable to start out with.
