Recently got myself an FZR600 and been asking the same question myself, mine came with a 150 fitted so I know it works but not ridden it yet (and the tyre was square and bald anyway)
If you do a google on FZR600 or look at FZR project, this site lists 2 ways to fit a 17" rim but both include new swingarms so not sure if you will want to go that route