[1] He manufactured off-road competition frames, forks and other components, later developing into the production of shock absorbers, specialising in modern-replicas of the traditional Girlings used as original equipment and replacements for historic motorcycles.
Over a 12-year career in Speedway, he rode for six teams; Harringay Racers, Wimbledon Dons, Leicester Hunters,[2] Oxford Cheetahs,[3] West Ham Hammers and Poole Pirates.
When riding in Grasstrack, Hagon started to develop a racing machine, with the assistance of Essex motorcycle dealer and competition sponsor Tom Kirby, creating a lightweight bike powered by a JAP engine.
Hagon's approach to weight-reduction included a custom-made frame also containing the engine oil, his own grasstrack front forks and brake intended for lightweight category machines, dispensing with the gearbox and seat, and avoidance of a supercharger, resulting in a wet weight of 235 lb (107 kg).
[9] In July 1967, riding a purpose-built sprint-bike powered by a supercharged V-Twin 1,260 cc JAP engine, he became the first rider to record a sub-10 second time with a one-way-only 9.93 performance at Duxford for the 1⁄4-mile distance.