BWSwamper, You are right. There is no way that the fork seals are going to be the same for the '85 and '86 Z forks. It is very common to see them listed as being interchangable. I don't think that it is too odd that some vendors don't know the difference between two model years of an out of production, quarter-century old three wheeler. I think it is VERY strange that you and I do. The three wheeler aficianados swear by the Yamaha fork seals. They weren't really made by Yamaha, but their price suggests that they are a premium product. I seem to have the same luck with Vesrah seals and put the savings towards beer. After I have enough beer, I don't care that my fork seals are leaking.