Yeah, you guys got it right. I went up to GnR cycles today and while talking to Troy, he explained the same thing. He had a cheat sheet printed up and let me snap a pic of it for u guys. I'll get it uploaded ASAP. (I Got computer problems, mostly operator malfunction)
Basically remember QUIZO. Those are the letters never used in the VINs all quads and cars use 10th letter as year codes (with a few exceptions IE Polaris)
85=f
86=g
87=h
88=j (because I isn't used)