first question: how I know if my 906 was made in 1989 or 1990?
second question: I can buy only the right one or I can swap from one to the other?
third question: where I can buy at the cheapest price the right kit?

many thanks

many thanks, I have just ordered on ebay a 15/40 did kit for 108 €, I think it's a good price, isn't it?ved wrote:the size of the rear sprocket has changed, 38 old, 40 new (or vice versa)
accordingly changed the length of the chain