Quite a bit on the site re forks but generally pertaining to mk2 and 9r.
Who knows if mk1 oem forks were linear, from the little i can see in the Haynes and on ebay it would appear so, i have progressive forks or dual rated forks in mine so now wondering what air gap is required, it's more if i remember for progs, certainly on the 9r and i seem to recall reading, maybe Wilbers mentioned a reduction of 10ml from the fluid capacity, of course that could be bollocks and i aint remembering right..
Will have a little poke around but any knowledge welcome..