BSA C15 — Wikipedia, the free encyclopedia

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BSA B 25 Star


The BSA C15 was a 250cc single-cylinder ohv motorcycle by the British company BSA between and 1967, and was BSA’s first unit-construction bike. At that a 250cc was the largest capacity that a learner could on L-plates in the United Kingdom, the C15 was to riders with provisional An off-road version, the C15T gave riders access to the of motorcycle trials .


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BSA acquired the Triumph at the start in 1936, and the BSA C15 250cc … was derived from the Triumph Tiger Cub. coming from the 150cc Edward Turner became of the BSA automotive division and in 1958 BSA the concept of unit construction, the engine and gearbox were in one piece rather than as components. The BSA C15 ‘Star’ was the first construction model and proved reliable and economical than its the pre-unit BSA C11. [ 1 ]

The engine had an iron barrel and head with overhead operated by pushrods which ran in a tube to fully enclosed The camshaft was geared directly to the which had skew gears a shaft with the points at the top and the oil at the bottom. The alternator was to the left and the drive was via a duplex chain to a plate clutch.

The four gearbox was at the rear of the vertically crankcase. The frame was single with twin rails the engine and pivoted fork suspension, and both wheels 17 inch with full cast iron hubs. An oil was under the seat on the right by a toolbox on the left. Between was an ignition switch panel the battery.

The headlamp was fitted in a nacelle also housed the instruments and as was fashionable at the time. Deeply mudguards were fitted to the model, making it look than it actually was. [ 2 ]

The C15 had a completely redesigned frame and the C15 engine also exploited an of being the biggest capacity a learner rider in the UK could use passing a motorcycle driving

The BSA C15 did, however, require maintenance and as well as oil leaks and faults there were with the gearbox, failures of the gear, weak big-end and with the adjustment of the clutch. [ 1 ] the distributor sprouted from the R/H side of the gearbox; but in 1965 the was moved to the left side of the

During 1967 the 250cc C15 was by the BSA B25 ‘Starfire’ and BSA C25 ‘Barracuda’ models, had a quickly detachable rear and 12 volt lights. The engine was increased in capacity to 441cc the BSA B44 Shooting Star and the BSA Victor [ 1 ]

Models [ edit ]

BSA C15 ‘Sportsman’ [ edit ]

In 1961 the ‘Super model (SS80) or C15 Sportsman the range, with a tuned roller big-ends and lower A faster 350cc version, the BSA B40 was added to the range but was not a big seller to the public, as it was too big for learners and too small for who had passed their motorcycle — but it was ideal for military use and was with the British Armed [ 1 ]

BSA C15G [ edit ]

BSA B 25 Star

The BSA C15G was from 1966 to 1967 and was the version of the C15 engine with the bearing timing side bearing, roller drive and strengthened crankcases, larger oil and needle roller gearbox bearings.

BSA C15T [ edit ]

The BSA was a trials version with a clearance frame fitted a reinforced plate, special ratios suited to off-road use and a level exhaust pipe. A tank and optional lighting it to be converted for legal road [ 1 ] The all-alloy engine had a special and was specially tuned for off-road use. The C15T proved to be at club and national levels, and it unchanged in the BSA range until [ 3 ]

BSA C15T Trials Cat [ edit ]

In and 1965 the overbored 500cc BSA ‘Trials Cat’ ridden by Smith won the 500cc World Championship. This success led to the of the 441cc BSA Victor Scrambler.

BSA [ edit ]

The BSA C15S was the motorcross version of the 250cc Star between 1959 and 1965. As the trials version, the C15S the weight of a battery through an transfer’ electrical system was notoriously unreliable. [ 1 ] The problem was the timing and points gap required far too careful setting for a rugged motorcycle. The scrambler C15 was unsilenced and had tyres and strengthened fork with rubber fork to protect the seals. [ 2 ]

BSA C15 Starfire [ edit ]

The BSA C15 Starfire was produced between 1968 and with chrome mudguards and side panels.

BSA B 25 Star
BSA B 25 Star


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