| Diagram | Fig. 19 — PETROL TANK, TWINSEAT AND CONTROLS · ref 34 |
| Subsystem | fuel |
| Listed in parts books | 1969–1970 |
BSA Bolt, tank mounting (5/16" British Standard Cycle × 3 3/8")
A 5/16 inch BSC by 3 3/8 inch bolt used to mount the petrol tank, per the parts book figure for tank, twinseat and controls.
82-9784 is a tank mounting bolt, 5/16 inch British Standard Cycle thread by 3 3/8 inches long. It shows up in the parts book under the petrol tank, twinseat and controls figure, which is exactly where you'd expect a fastener like this to live - holding the fuel tank down to the frame mounts.
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The catalog listing this comes from spans 1969 to 1970, so it's associated with that window of production, though we'd want to check it against your actual tank mounting setup before you order since tank hardware varies more than people expect between years and models.
If you're chasing down a rounded-off or stripped original bolt in this location, this is the replacement to look at. Bring the old one to the counter if you can, or measure what's in the bike now, since length and thread pitch both matter here.
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