1958 Ariel Square Four Mk II

British designer Edward Turner is most remembered for his engineering and design work on Triumph twins, but he also conceived and designed the very refined Ariel Square Four in 1928. There had been in-line fours for decades, singles and V-twins, but Turner felt this square layout was an efficient, nicely sized “package” to power a heavyweight Read more

1964 Bridgestone Super 7

Compared to contemporary motorcycle designs worldwide, Bridgestones were among the most advanced. While the typical and most common two-stroke engine is a piston port induction design, Bridgestone along with Kawasaki, experimented with a “rotary valve" induction that better controlled intake and exhaust. Bridgestones also incorporated primary Read more

1967 BSA Spitfire Special Mark III

Looking back, British motorcycles were at a peak around 1967. The Triumph Bonneville never looked or ran better, and BSA had refined their unit construction A65 650 twins to sell well in the American market. Soon Norton would release the new Commando. Triumph and BSA offered production racers for dirt track competition; BSA the high or low pipe Read more

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