The motorcycle is part of a limited series built in the early 1950s by Isle of Man TT competitor, E A 'Ernie' Barrett. Barrett probably opted for JAP engines for his Phoenix racers as he resided near the J.A Prestwich factory in Tottenham. Barrett designed frames for 250, 350, and 500cc categories. The exact production numbers remain unknown, but Barrett piloted a 250cc version in the 1953 Isle of Man Lightweight TT, while his 500 Phoenix stands as the last single-cylinder JAP-engined racer to compete in the period at the Isle of Man TT.

Featured in Motor Cycling magazine in 1952 and 1953 and other publications of the era, the Barrett Phoenix boasts an AMC gearbox, featherbed-style chassis with Earles-Type leading-link front fork, and swinging-arm rear suspension. Its engine, numbered for a 497cc overhead-valve racing unit with dry sump lubrication, dates back to 1951. Stamped 'S. MOSS' on the drive-side crankcase, the engine holds historical significance, and is believed to be linked to the late Sir Stirling Moss, possibly from a Formula 3 Cooper. Perhaps, just a handful of these JAP engines remain, with this unit acquired from sprinting legend Ernie Woods some 30 years ago. This has been a decade-long restoration, completing it about 18 months ago, including crafting the tank and seat and modifying the engine's position within the frame.