A post-war utility bike with rigid frame, un-damped forks, minimal brakes and side-valve engine. Not the most reliable bike.

Better than the C10 the motor has OHV. C11G was available as a 3 speeder with rigid frame or 4 speeder with plunger frame, both with a better front brake and generator electric’s. Not a bad looking bike

Basically the same engine as the C11G but housed in modern chassis with reasonable suspension, better brakes and a more comfortable seat. This is the last pre-unit construction 250.

A 250cc unit construction engine with neat  styling. In their day most models were prone to gearbox problems when treated harshly, but this should not be a problem now-a-days with an owner who rids the bike steadily. The sports version was the SS80 with roller big-ends which was quicker but was also less reliable, again this should not be a problem now-a-days. The standard models are easy to convert to 12v electrics, which improves lighting and allows the owner to fit electronic ignition. The C15T and Scrambles are more expensive to buy. An excellent classic to buy and own as there are plenty of models around and spares are easy to come by.

Restyled C15 to try and keep up with the times. Tougher internals and castings, but less reliable due to the high compression engine, big-end problems being the most likely. The B25 Starfire introduced in 1968 is a better bet as it was more reliable and had less vibration following a mild de-tuning. Also sold as the Fleetstar for fleet users which was a de-tuned version which gives more reliability and in a modified frame.

Last of the C15-based series with the new oil-bearing chassis and smart Street Scrambler styling for BSA’s final fling. Nice bike which was let down by the leaky and out-of-date engine. Naming it the ‘Gold Star 250’ did not help sales or credibility. Badly assembled when new, but any that are still running should be OK.