I haven't finished assembling my f4 yet beyond the initial test fit. From what I can tell, if you're using all of the older bits with the newer swing arm, it should all fit together. The adjuster on the later bikes is a bit wider as it has real rod ends in it. If you use the old adjuster you will need to add a spacer to take up the extra width on the swingarm side. I'm hoping that the brutale adjuster is shorter than the later f4 rod so that I can use it instead. Any shock that fits the 99-09 setup will fit with the new swingarm. Until I measure I can't be sure, but my theory is that the late model brutale is essentially the late model swingarm with the early geometry, where as the later f4 has a tweaked geometry. Another piece of the puzzle is that the early mag frame plates have two holes for the pivot mount, the standard only have one but there is space in the recess for a second. Once I have my bike reassembled I will measure it all out, but I think you should be ok using whatever shock you already have.