The BSA C12 was a British

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 motorcycle

Motorcycle

A motorcycle is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.Motorcycles are one of the most...

 produced by the Birmingham Small Arms Company

Birmingham Small Arms Company

This article is not about Gamo subsidiary BSA Guns Limited of Armoury Road, Small Heath, Birmingham B11 2PP or BSA Company or its successors....

.

The C12 used the same engine as the earlier C11G but in a more modern chassis. It had reasonable suspension, usable brakes and comfortable seat which meant it was more useful than the earlier models. Minor engine modifications meant it was also far more reliable.

Specification

• Engine
  • Bore 63 mm
  • Stroke: 4
  • Capacity: 249 cc
  • Power: 12 hp
    Horsepower
    Horsepower is the name of several units of measurement of power. The most common definitions equal between 735.5 and 750 watts.Horsepower was originally defined to compare the output of steam engines with the power of draft horses in continuous operation. The unit was widely adopted to measure the...
    
    

• • Carburettor: 28/32 inch AMAL
    Amal (motorcycle)
    AMAL is a British carburettor trademark. AMAL were the suppliers of carburettors to the British motorcycle industry and their products were present on the products of the largest British motorcycle manufacturers such as BSA and AMC...
    
     Monobloc
    • Main jet: 140 (100 if used with air cleaner)
    • Pilot jet: 25
    • Throttle valve: 3½
    • Neddle position: 3
    • Needle jet: 1055
    • Air cleaner: Cheswick & Wright

• Weight: 320 lb

• Wheels:
  • Rim size : WM1-19
  • Tyre size: 300-19
  • Tyre pressures:
    • front: 18 lbf/in² (125 kPa)
    • rear: 26 lbf/in² (180 kPa)

• Brakes;
  • Front: 7 in diameter by 1⅛ in wide
  • Rear: 5½ in diameter by 1 in wide

• Electrics:
  • Battery capacity: 12 ampere-hour
    Ampere-hour
    An ampere-hour or amp-hour is a unit of electric charge, with sub-units milliampere-hour and milliampere second...
    
    s
  • Generator output: 50 watts
  • Contact breaker gap: 0.015 inch

General Details:

• Front suspension movement: 6 in
• Rear suspension movement: 2⅜ in

• Overall length: 82 in
• Wheelbase: 54 in
• Ground Clearance: 4 in
• Saddle height: 29½ in
• Overall height: 40 in
• Handlebar width: 26½ in