Eddie Mulder wheelie, 1969(Photo: Dan Mahony) Triumph, Norton and BSA motorcycles spearheaded the British invasion in the US throughout the 1950s and by the early ‘60s were dominating offroad competition, both on the dirt track and in the Californian desert. Lightweight and quick, the overhead valve parallel twins outperformed their more cumbersome, American-built rivals, the side-valve Harley Davidson 750cc vee-twins. To give the Harleys a sporting chance against the faster foreign…
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