| Also known as | 24-36 |
| Diagram | Fig. 3 — CRANKCASE · ref 14 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1972 |
BSA Sealing washer — revolution counter cable
A sealing washer for the revolution counter (tachometer) cable fitting at the inner timing cover.
This is a sealing washer that sits under the revolution counter (tachometer) cable fitting where it threads into the timing cover area. Its job is simple: keep oil from seeping out around the cable connection where it passes into the crankcase/timing chest region. It shows up in the parts books under the inner timing cover and gearchange mechanism figures, which tells us where on the engine this fitting lives.
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The part also carries the older alias 24-36, so if you're working from an earlier parts book or a bin of used parts marked with the shorter number, that's the same washer. Appears across catalog entries spanning 1969 to 1972, though we can't say it's limited to those years on your particular machine — check your own parts book or bring the old one in and we'll match it up.
It's a small, inexpensive item to have on hand. A tired or crushed sealing washer here is a common source of a slow oil weep around the tach cable, so if you're chasing a leak in that area, this is worth checking before you go hunting elsewhere.
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