Hi, There’s a saying good minds think alike. It was a time of discovery & innovation. Yet product had to be affordable to build & buy. Turner & others had this formula worked out well. The introduction of high octane fuel allowed huge increases in effective compression ratio & power.
A very important part of success in sales is a good dealer network. Triumph & Harley, Honda understood this well.
Indian, BSA, Norton
were lacking here, especially in the 60s.
The old timers when I worked at Harley dealer to a man felt Indians were better. But dealers were not so good overall. Indian owners got feed up with dealer issues & moved to Harleys.
My local BSA dealer was a greasy hole in the wall. Terrible service too. Local Norton
dealer was in lawnmower shop! Lawnmower mechanics struggled best they could.
Everyone at Trumph/BSA wanted to innovate except the top brass. The results is history.