BSA M21 600cc single-cylinder. Newly restored, it runs beautifully. In great condition, it runs and drives well. Everything has been renewed. Everything works. Very nice paint and new chrome. New spokes, rims and tyres. New exhaust and damper. New electrical Lucas wiring, new battery. All cables renewed. Technically completely overhauled. New piston (first oversize) and valves. Clutch overhauled. It drives, brakes and shifts well without any mechanical noises. Great sounding, large single-cylinder engine. It's easy to start. Original and correct frame number and engine number. Registration can be requested by agreement. For French buyers: A free "carte grise de collection" is included.