HISTORIC MOTORCYCLE FEATURES

Historic motorcycle feature stories.

Hairpin valve springs

Hairpin valve springs

The Hairpin Valve-Spring Return System (HVRS) was patented by Sunbeam for its motorcycle engines, in 1925. Engine designers employed different methods for valve control, including coils, hairpins and, later, desmodromic (no springs at all).

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A Three-wheel Odyssey

A Three-wheel Odyssey

Australian motorcycle outfit rider Ken Hibberd landed at England’s Southampton dock in the 1960s with £45 in his pocket and a dream of racing at the Mecca of Motorcycling – the Isle of Man TT.

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