classic motorcycle forum

Tks for your fast reply, sorry maybe I should have be more specific, it's not my first BritBike, I am mainly interested in the distinctives between the other years of the same type bike, i.c. introduction of nacelle, type of brakes, iron/alloy cyl head and of course colours available for this year. So far, apart for purchasing the books, on internet it's not possible to find this info. Tks for your assistance, Will