| Diagram | Fig. 12 — SWINGING ARM, CENTRE STAND, REAR BRAKE CONTROL · ref 32 |
| Subsystem | suspension rear |
| Listed in parts books | 1969–1970 |
BSA Lock plate, swinging arm
A swinging arm pivot lock plate, catalog number 82-9539, cataloged for BSA models around 1969-1970.
This is a lock plate for the swinging arm pivot, part number 82-9539. It shows up in the swinging arm, centre stand, and rear brake control sections of the parts books, which tells you it's a small fastener-type piece that keeps something on the swinging arm pivot assembly from working loose rather than a structural component itself.
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The catalog appearances we have on file run 1969 to 1970, so that's the window this number turns up in. Our record ties this to BSA rather than Triumph, so if you're working on a Triumph swinging arm assembly, check your parts book carefully before ordering this one.
It's a simple, low-cost item to keep on hand if you're rebuilding the rear end and want to replace the small hardware along with the bushings and pivot shaft. Call the shop if you're not sure this is the right number for your bike.
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