I believe you can. Here's copy/paste from the manual traction control section (page 65). It says that DTC 7 was optimized for a 190 tire:Anyone switch to a 190 on the rear? Are you able to do it on the current rim?
I like the look of the wider tire. Always did it on CBR 600 and GSXR 750. Put a 200 on my GSXR 1000.