will a 180/55/17 fit a katana 600 (2003)?

Answer 1

You can wedge it on the rim probably but the profile will be all f%cked up and it wont handle for sh%t (way less grip while leaned over because the contact patch gets rolled over becuase the tire is too big for the rim). Basically one size larger over stock wont hurt the handling too bad, but for best cornering run the stock size.