Ive got a post on fzs600 forum here as my bike was lowered quite allot when i got it,
just had it jacked up and its a different bike now however i still think the bike was good even with the lowering kit on,
it seemed a bit harder to get the bike leaning over and i had trouble changing gear but thats coz im tall,i was doing some respectable speeds on a longish 200 mile run and was none the wizer at the time about it being lowered,kinda like cutting yourself and not feeling the pain til you notice it type scenario i reckon,
not sure bout the fz8 but the old fazer 6 was simple as replacing wishbones,2 bolts per side,the front forks hadnt been touched.