Description
1959 BSA M21 – Ex-AA Patrol Bike | 600cc Side-Valve | Built for Duty, Ready for the Road
Originally serving as a roadside rescue bike for the AA, this 1959 BSA M21 carries with it the grit and reliability of Britain’s golden age of motorcycling. Purpose-built for long days and heavy loads, the M21 was the trusted machine of patrolmen across the country — and this one still proudly tells that story.
Powered by BSA’s famously dependable 600cc side-valve single, it’s a bike that chugs along with effortless character. The deep exhaust note, upright stance, and robust frame make it a joy for relaxed weekend runs or classic show appearances.
Presented in beautifully preserved condition with period-correct features, this former AA patrol bike is a rare survivor and a real talking point wherever it goes.
Available now at Franks Motorcycles, Colchester — a salute to a time when bikes were tools, not toys.
Franks Heritage – Supplied exactly as seen
• No preparation work carried out
• 1-month warranty (engine & gearbox)

























