Hi, I just recently aquired a couple of rm80's, but have been incredibly unsuccessful in identifying their model years. Now in all my searches I have what I believe is just a frame #'s but they are not actually the vin number. (is that a true statement?) Perhaps some of you can tell me where it is they hide this vin #. I also have engine #'s, would either the frame # and engine # help in deciphering their age, if so how? I need this so that I can order the right year parts and manual. thx Jen