Actually the bike is a '74 Mk7 Pursang with black paint tank instead of blue and white.
Imagine the crash he would have had on a steel waterpipe frame Bandito, would have been heaps bigger, talk about raising the BULLdust!
ps. Saw Chuck ride up at Archerfield supercross on the 'new' 450 Prolink Honda, loved the look of that bike so much, just had to buy one - somewhat regretfully.