Your 100% correct the rear shock on the FZ8 is a pogo stick. That is why I did what some of you guys did with Sataan's R1 shock upgrade option.
I could also go the same route with R1 forks like some of you guys too, but on the FZ8 I would need:
forks
wheel
front axel
front rotors
might as well do the brake system too.
I will just either rebuild the stock front end with race tec springs, valves, and oil or try and find some FZ1 forks and take the interals out of them. Then rebuild them and place them in my stock fork housing. That way I would at least have preload adjustment.
I am racing supermotos now and the FZ8 is just a great bike for me to ride on the street here in FL. The draw back is I am one of those guys that likes to upgrade things.