BSA Parts List 1972, A65, A70

BSA Parts List 1972, A65, A70

BSA Replacement Parts List for 1972 A65 models, includes A70 supplement
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BSA Parts Catalogue for 1972 Twin Cylinder Models
Re-printed coil bound copy of the factory publication, A4 page size.

Covering Frame and Engine Numbers (at start of production year)

650cc models
1972: A65 Thunderbolt: A65T-
          A65 Lightning: A65L-

750cc models
          A70 Lightning: A70L-

In 1969 a new numbering system was introduced using a two letter prefix for the month and model season year. 

The first letter designates months as follows:
A: January  B: February  C: March  D: April  E: May  G: June  H: July
J: August  K: September  N: October  P: November  X:  December

The second letter is the year code:

G: August 1971 to July 1972 for bikes made for 1972 selling season.

Numbering started at 00101 and carried across all models.


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