i can't find those either. maybe i just don't know where to look.
here's why i'm interested. i'm in casual conversation elsewhere with a manx Norton
guy (who seems to know his [***]) and he recalls that works bonnevilles at the 67-68 TT went through sulby at around 148 mph. that's an incredible speed for any old twin, factory-prepared or not, and i'm trying to find out who exactly ran the TT that fast back then.
i'm looking though claudio sintich's book, triumph thruxton bonneville, 1959-1969
, which lists specs and reproduces some race reports from the media of the time. as i am finding, the class was 750cc and the works thruxtons in 1967 were 40-over, at 668cc. they ran 20/43 or 20/46, because the 21s weren't available. so to make 148mph, i calculate that they had to spin them to 8300 on that straight. they were doing this with mufflers, too.
in 1968 the lap speeds were about the same, but the top speeds for the triumphs and BSAs were around 132mph, according to sintich:
so i'm curious as to whether i'm missing something.
no information on that fast Norton