I currently have a Dunlop MU86B16 M/C rear tire, it appears I could go about 1/2 wider without creating any issues, any suggestions on a slightly wider rear tire that doesn't require new swing arm etc...
For your model and year it's supposed to be a 150/80-16 bias tire. So I think you could safely go to 160 with a rear shinko. Surely others will chime in on this.