BSA C11 Parts & Spares
The C11 is the 250 OHV single BSA sold in quantity to people who wanted transport rather than performance, and a great many survived precisely because they were never asked for much. The C10, C11G and C12 sit alongside it and share a good deal.
Obsolete Bike Parts holds the C-range parts that wear: clutch plates, gaskets, pistons and the silencer.
C10, C11, C11G and C12
The side-valve C10 and the OHV C11 ran through the forties and fifties, the C11G brought the alternator and a four-speed option, and the C12 followed with swinging-arm rear suspension. Clutch plates and silencers cross between them; pistons, gaskets and gearbox parts often do not.
What we stock
- Engine: gasket sets for the C11 and the C11G OHV, oversize pistons, exhaust valves
- Clutch: four-plate sets covering C10L, C11G and C12, plus six-spring friction plates
- Transmission: three-speed gearbox sprockets
- Exhaust and oil system: silencers for the C10, C11 and C11G, plunger oil tank filters
Carburation and the bigger singles
Carburettor parts are listed under Amal, including Monobloc units. If your machine is one of the later unit singles rather than a C-range bike, look under BSA C15.