Ron, was this Ascot (TT with jump)? Can't tell from the black and whites photos, but that looks like red numbers on a white background, were you an AMA Novice in these photos? I rode a 350 twin as a novice (1973), have some great stories from that old beast!
Looked at the photos of your street tracker (66 Triumph), that is an amazing piece of artwork. Thanks for checking in on my humble project.