This guy just stole my would be bike!
The front brake looks like the ones used on the AJS/Matchbox heavyweight singles. (Or was it all AMC bikes?) If it is, I can remember them being barely adequate on my Dad's G3LS - no need for ABS on that, so must be terrifying on a 750 twin!
To me is was always between Steve McQueen (Triumph) and Clint Eastwood (Norton), although I do recall a film when Clint was racing a villan and he was on a TR6 - was it Coogan's Bluff maybe?
I loved that film, made me want a motorcycle so bad!
And I still had quite a few years before I was legal!