BSA C12

The BSA C12 was a British motorcycle produced by the Birmingham Small Arms Company.

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.

Characteristics

pecification

*Engine
**Bore 63 mm
**Stroke: 4
**Capacity: 249 cc
**Power: 12 hp

**Carburettor: 28/32 inch AMAL 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-hours
**Generator output: 50 watts
**Contact breaker g

General Details:
*Front suspension movement: 6 in
*Rear suspension movement: 2⅜ in

*Overall length: 82 in
*Wheel base: 54 in
*Ground Clearance: 4 in
*Saddle height: 29½ in
*Overall height: 40 in
*Handlebar width: 26½ in

Performance

*Top speed: 70 mph
*Fuel ecomony: 80 mpg