The frame and engine numbers follow different systems for each Bridgestone model.įor the single cylinder models, the enigne number is stamped on the transmission case, and is of the same format as the Vehicle Serial Number previously described. Relevant "milestone" dates and serial numbersĪvailable for the models sold in the U.K. Is quite easy to work back from these "milestone" dates to date any individual Serial numbers when modifications were introduced on the production line.
Records for each model, but the factory Parts Lists do give specific dates and No official information is available on production The precise month of manufacture is obtained by combining the month code and Motorcycle and simply increments for each successive machine built, starting The Identification Number (last five digits) identifies the individual Of manufacture and repeats in a 2-year cycle, starting on an even year The Month Code (third alpha character) identifies the month BS 90 DeLuxe, Trail and Mountaineer (Oil Injection versions) The Model Code (first two digits) identifies the basic modelįrom which the machine is derived, and the code numbers used were asġ2. Typical serial number (actually from my own 350 GTR) is shown below: The Vehicle Serial Number follows the same format for all models,Īnd uniquely identifies an individual machine as it leaves the factory. There are the usual engine and frame numbers, with anĪdditional Vehicle Serial Number on a separate plate riveted to the frame. There are three different identifaction marks on all Bridgestone Originally appeared in the UK Vintage Japanese Motorcycle Club Newsletter Bridgestone Frame and Engine Serial Numbers Bridgestone Frame and