• Bsa Bicycle Serial Numbers
• Bsa Bicycle Serial Numbers Database
• Bsa Bicycle Serial Number

BSA Ladybird gives your dreams wings on two wheels. With a BSA Ladybird by your side, every moment becomes joyous, exciting and amusing. Each ride is fun, comfortable and secure with the exciting new range of colourful and feature loaded bicycles. These bicycles enable you to explore the world fearlessly with confidence.

• Mansell-Jones, 'Sunnyside,' Lodge Road, Croydon, Surrey, Patent No.Weight 10 lbs. Presented by Harry Green. Two earlier patents by the same inventor, Nos. And 7141/1899, show a similar result achieved by a system of spring-controlled toggles, which allowed the ends of the seat-stays to rise and fall, and the rear end of the.
• BSA used a system of letters and numbers for yearly identification of their machines. This information combined with the yearly numbers below should help you identify the year and model of your machine. The Frame Numbers are alway stamped. If you find raised numbers, these are casting part numbers.
• This serial number is important for two reasons: one, if you don’t know what type of bike you have, you’ll be able to find that out with a simple bicycle serial number chart. Two, in case your bicycle gets stolen, you’ll be able to track it down since anyone, including the authorities, can identify the bike by serial number.

In 1969 the BSA and Triumph factories moved to a common numbering system used for both engines and frames. This system was used throughout the production run of the Tridents and the Rocket 3s.

Engine and Frame numbers are composed of a model identifier, a two character date code (month and year) and a five digit, sequential serial number. On some models the model identifier appears at the beginning and on other models the model identifier appears at the end. The date code always appears immediately preceding the five digit, sequential serial number. Frame and Engine numbers would have matched when the bike left the factory.

Bsa Bicycle Serial Numbers

Bsa Bicycle Serial Numbers Database

The process appears to have gone something like this: As an engine was completed on the engine production line it was stamped with the five digit sequential serial number. The engines were then stored - awaiting buildup into a frame. As the frame was completed as a completed rolling chassis an engine was pulled from storage and installed in the frame. As a result the engines were not always used in exact numerical sequence. When the engine was added to the frame the month and model year code was added - as was the model identifier.
This would explain why sometimes bikes with early serial numbers were shipped a couple of days later than bikes with subsequent serial numbers.

The last BSA Triples . . .
The last batch of BSA Triples shipped to the US market went out in two shipments in early November 1971. The bulk of these bikes were shipped on 1st November. Another three bikes were sent the following day. These were the last of the BSA Triples destined for the USA.
After that, about another 200 bikes were built and shipped to various other markets before BSA closed it's doors forever. The last shipment of four bikes was on 8th September 1972.

Bsa Bicycle Serial Number

The last Triumph Triples . . .
The last Triumph Tridents were T160s. Production for this model was started, as usual, in August of the preceding year (1974) and ran through July 1975. However, some of the very last bikes were built in late 1975 and into early 1976. These bikes will have 'N' as the model year - even though there was no official 1976 model year for the T160. All told, about 7,500 T160s were built.

A word of warning...
Be careful about relying on a specific serial number to validate your bike's age. The original records are the best place to go if you have doubts. Although even these records contain human error. Often, if the official 'engine stamper' stamped the same serial number two times in a row, they simply used different months to make those bike's numbers different. There is one instance of two 1972 Rocket 3s that were stamped with the same serial number and the same month/year combination - identical engine numbers! To make matters worse, both of these bikes were originally shipped to dealers in the same country - the UK.

The earliest run of BSA Triples were assembled in varying months - but were collectively stamped with a given month ID. Why? Who knows?

Interestingly, again in the case of BSA Rocket 3s, some very late 1971 engines were used for the first 1972 models. The production run of 1971 bikes ended with A75R JE01184. However, some engines that had already been stamped prior to 01184 were not used for 1971 bikes but instead were used for the very first 1972 model bikes. So these very first 1972 bikes have oddly high serial numbers (such as 01172) - higher than the production run of 'normal' 1972 bikes which ran from 00101 to 00634.