not necessarily.... my 2000 gpr is designated gp1200AY,,, but called a gp1200r.......New here but I do know the answer to this one: The letter is the designation by Yamaha of the years. I have a 1999 Yamaha GP1200(x) where x designates the years of certain models. After the (x) came (r) GPr. Hope that helps. Do a google and find the other year designations.