As much as I like the look of my old Sidi three stripers (long gone thanks to my late dad chucking them without telling me!) i wouldn't go back to them for quids. Likewise the old school helmets. The Sidi Techno-flex boots and modern Shoei helmets protect both ends of me very well and at the end of the day that gear is worn far more through the year than 'period gear'.
While I would like to look how I did in 1975 it's not practical. No more Bell Magnum, Jofa, Lambert leathers, Sidis and Golden Breed for me thanks !!! Let alone the transition gear - aka desert boots, GP boots footy jerseys etc etc - that was then and this is now.
There are enough 'rules' governing the sport without the fashion police kicking in, sorry.
Dave Mac