07candyfz6,
I can answer most any question you or anyone may have about motorcycle chassis and suspension systems. If I can't answer it directly, I can get answers. I know jack ( that's my dog's name). It is what I do for a living, modify, maintain, upgrades, repair, etc.
We measure and straighten motorcycle frames, swingarms, forks, triple clamps and we do suspension.
The racetech emulators are a very good upgrade if installed properly. Depending on your weight, you may need springs. Like any fz rider over 130 lbs will benefit from more fork spring rate, (not just more preload) and the better damping provided by the Emulators.
Putting stock r6 forks on your fz would not be as good an improvement as the properly installed emulators and springs. The stock cartridge forks on the
r6 will need more money thrown at them than emulators.
If you really want adjustable r6 cartridge forks that have already been upgraded with full race internals, gauranteed straight, I have a customer that wants to move his spare front ends (forks, clamps, axle as an assy) from his days on '03 and '05 r6's he raced on. He has since moved to late gen r6s and the team won the wera national endurance series middleweight superbike class in '08. We are setting up the team's new '09s presently. Anyway he has two of these front ends complete and ready to go.
pm me and I will put you in touch.
I hope it is okay to mention used parts for sale here.
All the best
Kent Soignier