The Birmingham Small Arms Company (BSA) is a British based airgun and shotgun manufacturer and former
manufacturer of motorcycles and both sporting and military firearms.

BSA was founded in 1861 in the Gun Quarter, Birmingham, England by fourteen gunsmiths of the Birmingham Small
Arms Trade Association, who had together supplied arms to the British government during the Crimean War.

we hope she remains
Joerg's beautiful BSA,
as she was in
'all-round' sportbike of the 1960s, planned the
touring BSA Thunderbolt and the supersports
BSA Spitfire. Development of the engine aimed to
make it more reliable, quieter and less prone to
oil leaks, with top speed sacrificed to improve
mid-range and rideability. With twin carburettors
the A65L could still reach 108 mph (174 km/h),
however. Improvements included an oil pressure
warning light which had a tendency to
malfunction, so riders learned to ignore it.[2]

A close ratio gearbox combined with a high kick
camshaft made for lively acceleration and
performance at higher rpm than the standard
A65. The bottom gear was a bit high, however,
mph (16 km/h). Above 5000 rpm customers also
complained about excessive vibration, with a
tendency to weave above 90 mph (140 km/h). A
useful feature was an 'emergency starting' key
position for times when the battery was flat to
connect the alternator current directly to the
ignition coils