Lot details Registration No: SOP 328 Frame No: BB31876 Engine No: BB3122802 cc: 350 MOT Expiry Date: None
The B31 was unusual in its class in having been designed for the post war period rather than being, like many of its rivals an updated pre war design. The first B31 formed part of BSA's first post war catalogue, announced in August 1945 and appeared to be a thoroughly modern interpretation of the traditional sporting middleweight single with telescopic forks and a four speed gearbox. Finished in black with a silver and chromium plated fuel tank it must have appeared fresh and exciting to riders used to seeing matt khaki painted singles for the last six years. Endowed with good performance, 70 mph being attainable using 73 octane pool petrol it quickly established itself in the market and would sire a range of increasingly glamorous models culminating in the post war Goldies. The over head valve engine featured an iron top end and a separate pushrod tunnel. 1948 saw a change of livery with the silver tank panels giving way to green lined with gold and a new, stronger rigid frame was adopted. The next significant change occurred as the forties drew to a close with the option of a plunger frame being introduced. For 1954 the pivoted fork frame, first seen on the Gold Stars became available to the B31.
This example was restored during 2006 and is described by the vendor as "running perfectly". It is accompanied by a quantity of original paperwork relating to the machine from BSA including the original guarantee and a "Running Instruction Card" together with a green continuation log book.
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